Hello,
In my experience as a medical student, we usually had Monday and Tuesdays for our labs usually from 9 till about 3. Wednesday we had half days, as most of the students have afternoon activities with different societies. Thursday and Friday we would have lectures till about 5 pm.
In my clinical years, my schedule was divided as placement days, with one day off, and one day of teaching,
I hope this gives you a better idea of how they can be.
Good luck,
Haya - MBBS V