It truly depends on your location and your role.
I worked at one of the resorts and was always scheduled at least 5 days (40hrs). Even during "slow" times. Unless I had specifically requested 3+ days off in a week, I never once was scheduled less than 5 days/40hrs.
If we were short staffed or we had Groups checking in, I'd automatically get scheduled a 6th day.
I could also pretty easily pick up OT (either extra hours the same day or picking up an extra day) quite easily if I wanted to. I tended to pick up as many hours as possible if I didn't have plans b/c the OT pay was quite nice, especially when my student loan payments came due.
My roommates all worked at MK and were all scheduled at least 40hrs as well - since MK is quite busy.
I had friends who's roommates, however, were lucky to get 3 days some weeks. If they wanted extra hours, they'd pick up PAC shifts, look online for extra hours, or see if someone was willing to give away a shift.
Again, it all depends on your role and location.