Where I grew up (rural), it was every other Saturday or Sunday. So if the Blood was offered on Saturday one week, it would be offered on Sunday the following week, alternating in this way.
Every Sunday at my Catholic college.
Never offered at all at my first parish as a young adult (moving to another city as a single).
At our current parish, it’s offered every weekend. Whether I receive or not really depends on how many people are in line. Germs and such aren’t such a huge concern to me, but I just don’t like when there’s a huge line that backs up into the main line.