Most age groupers and college athletes that are highly competitive may swim twice a day, and maybe once on Saturday, then have Sunday off, these workouts can be up to 2 hours long. So basically in a week, a competitive swimmer could be swimming, 20-24 hours total. Now that is a lot of swimming.
I am sure that the other swimmers here, who swam college and/or age groups can tell you better what swim programs are like these days, I have been out of that type of swimming for about 17 years now.
