Training is not “most weekends off.” Class start almost every day and you get on your 4/2 or 5/2 cycle. If you’re on a 5/2 cycle and start on Monday you’ll have every weekend off. If the classes were starting every day one pairing (2 FO’s or 1 CA and 1 FO, gets every weekend off, one pairing would get every Saturday off, one pairing would get every Sunday off, and the other four pairings would work every weekend.

Training start every day would be 60 ‘starts’ per month. I’d be surprised if it’s that high. Thirty starts would be an aircraft training class starting every other day.

A 4/2 schedule would have some weekend days off.