This question must take proper research time to answer, since the prevailing opinion here is that such a thing is not possible.
- How much time did it take?
"The Time Question
“Much less has been defined as to when the universe, life, and man appeared. The Church has infallibly determined that the universe is of finite age—that it has not existed from all eternity—but it has not infallibly defined whether the world was created only a few thousand years ago or whether it was created several billion years ago.”
It is obvious that the Church allows this, and further, it has made an infallible determination about the age of the universe. I point this out because God does give us Divine Revelation.
"According to the chronological reading, the six days of creation should be understood to have followed each other in strict chronological order. This view is often coupled with the claim that the six days were standard 24-hour days.
"Some have denied that they were standard days on the basis that the Hebrew word used in this passage for day (yom) can sometimes mean a longer-than-24-hour period (as it does in Genesis 2:4). However, it seems clear that Genesis 1 presents the days to us as standard days. At the end of each one is a formula like, “And there was evening and there was morning, one day” (Gen. 1:5). Evening and morning are, of course, the transition points between day and night (this is the meaning of the Hebrew terms here), but periods of time longer than 24 hours are not composed of a day and a night. Genesis is presenting these days to us as 24-hour, solar days. If we are not meant to understand them as 24-hour days, it would most likely be because Genesis 1 is not meant to be understood as a literal chronological account.
“That is a possibility. Pope Pius XII warned us, “What is the literal sense of a passage is not always as obvious in the speeches and writings of the ancient authors of the East, as it is in the works of our own time. For what they wished to express is not to be determined by the rules of grammar and philology alone, nor solely by the context; the interpreter must, as it were, go back wholly in spirit to those remote centuries of the East and with the aid of history, archaeology, ethnology, and other sciences, accurately determine what modes of writing, so to speak, the authors of that ancient period would be likely to use, and in fact did use. For the ancient peoples of the East, in order to express their ideas, did not always employ those forms or kinds of speech which we use today; but rather those used by the men of their times and countries. What those exactly were the commentator cannot determine as it were in advance, but only after a careful examination of the ancient literature of the East” (Divino Afflante Spiritu 35–36).”
"The Topical Reading
"This leads us to the possibility that Genesis 1 is to be given a non-chronological, topical reading. Advocates of this view point out that, in ancient literature, it was common to sequence historical material by topic, rather than in strict chronological order.
"The argument for a topical ordering notes that at the time the world was created, it had two problems—it was “formless and empty” (1:2). In the first three days of creation, God solves the formlessness problem by structuring different.aspects of the environment.
"On day one he separates day from night; on day two he separates the waters below (oceans) from the waters above (clouds), with the sky in between; and on day three he separates the waters below from each other, creating dry land. Thus the world has been given form.
“But it is still empty, so on the second three days God solves the world’s emptiness problem by giving occupants to each of the three realms he ordered on the previous three days. Thus, having solved the problems of formlessness and emptiness, the task he set for himself, God’s work is complete and he rests on the seventh day.”
"The argument is that all of this is real history, it is simply ordered topically rather than chronologically, and the ancient audience of Genesis, it is argued, would have understood it as such.
"Even if Genesis 1 records God’s work in a topical fashion, it still records God’s work—things God really did.
"The Catechism explains that “Scripture presents the work of the Creator symbolically as a succession of six days of divine ‘work,’ concluded by the ‘rest’ of the seventh day” (CCC 337), but “nothing exists that does not owe its existence to God the Creator. The world began when God’s word drew it out of nothingness; all existent beings, all of nature, and all human history is rooted in this primordial event, the very genesis by which the world was constituted and time begun” (CCC 338).
“It is impossible to dismiss the events of Genesis 1 as a mere legend. They are accounts of real history, even if they are told in a style of historical writing that Westerners do not typically use.”
Source: Catholic Answers Library
The point is - God did something. Genesis is crucial to the belief systems of too many people who must believe only billions, as opposed to thousands, of years have passed. Any attempt to throw out or undermine that idea would be a serious blow their belief system.