Depends on the horse.
My show jumper is schooled 1ce or 2ce a week in addition to regular riding and exercise (arena, conditioning, trails, lunging etc.)
The 4 year old I'm training, is schooled 3/4 times a week, wtc, and over trot poles (in addition to regular exercise)

I like to school the flat often, but i never jump more than 3 sessions a week at most, I usually only jump 1ce or 2ce a week.

idk, it's hard to explain, I have an insane schedule to fit all the horses, and they do a different activity each day.

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