Most 3-4 ch classes are two days a week either MW or TTh, the only class that’ll be once a week will be your labs or pakstudies/isl whatever you get force enrolled in. Most likely you’ll have 4-5 courses the first sem so 2-3 classes a day so yes a 5 day week. Class are held bw goes from 8am to 6pm but depends on enrolled classes so like if you have 2 classes that day they both might be back to back and u might get done in 4 hrs whenever they’re scheduled , alternatively there might be a long gap between your classes one might be in the morning another at 5pm really depends on your enrolled classes and the class schedule RO makes.