Believe it or not, I am serious. If a kid is on a 14U TB team and the pitchers work out at team practices a couple times per week and plays every weekend she is getting enough pitching time IMO.
A kid who is 16-18 years old and very serious about playing college ball will probably want to pitch 6 days per week. I've seen many at this point get burned out and decide pitching isn't for them.