My program is front-loaded, meaning we do a year of full time didactic and then have clinical along with an online class every semester and a once a month testing to prepare for boards at our school. During our clinical portion, we go to the OR 4-5 days a week. I get there around 6 am, earlier when I am at a new site, and stay until the cases are done. This could be around 4 or 5, but I have been there until 9 pm at times, and frequently until 7-8 pm. During our clinical phase, we write care plans
(no, they never go away!), study for the next day's cases, study for our monthly exams, study for boards on top of our monthly exams, and do our work for our online classes. Oh, and we have a capstone project to complete too.
Focker is right, the clinical hours alone really don't matter. Just be prepared for school own a large part of your life for the duration of your program. Getting in is the easy part.