Things change, but usually there are only a few SAMI's per semester. Most weekends, you'll have Friday night, Saturday, and most of Sunday as free time. First semester has football games on a lot of Saturdays, so that will take up a lot of time, but it's not exactly work. How often you can leave will largely be dependent on your squad and your performance. Freshmen don't get many passes, but you can earn extras by volunteering for stuff or doing well in academics, athletics, or military areas. Also, some squads will restrict the entire class for poor performance, so if you are in a tough squad, you will need to do well as a team to have the option to leave on the weekend.