I thought it was just 15 out of 30 days? That's what I remember from the last time I did it. I just checked that save and that's what it says, 15 out of 30 days. If you go that route it's a good time to get your girls some academy training (and job training/income) too while you're tutoring.
I never had a problem teaching my required time, and there comes a point where you don't really need to do any more training.
need to find it in code, but I think it's 15/18? or 15/20? None of my char R qualified to teach in 811,
tried teaching guy on old version, but you only get that exact screen [15/XXX] when START, or end? terms I think.
Training varies greatly, but for *MAX* $ profit, you need MAX stats, [selling] & yes that means lots of training.
More girls= more time needed to train, (even if you don't sell, they'll make more $ as say, dancer, than low paying job)
many things factor in, but train +4/day, versus say, train +1, FAIL 1, is *HUGE* difference; [1 day vs 4]
Feminsts, (can't keep happy/affection) etc many are hard to train.
No matter what you do though, eats up most of day (time) so train & teach mutually exclusive)
Haven't tried it yet in 811, has anyone? [MC teaches Acad/Sci, + TRAIN say 3 girls & sell for MAX stats]