Actually, there has been a little misinformation given here. As both the OCarms and the OCDs are set up as autonomous monasteries, the schedule for such things as Holy Hours or Eucharistic Adoration can differ greatly from monastery to monastery, so there is no one ‘Carmelite way’ with regards to this matter.
While it is true that some monasteries do not do a regular Holy Hour, there are communities that do offer this on a regular basis (often on a Friday evening along with Vespers for the public).
And almost all communities have at least one day per month for Exposition of the Eucharist, with nuns being scheduled for one hour each, and those not scheduled being allowed to spend extra time when they are free from other duties. Some communities offer this to the nuns only, while other communities allow the public to participate from the chapel; it depends on how their chapel is set up.
If you are considering a particular community and this is important to you, the best way to get information is to contact the community directly.