Seems excessive to me too but DD is not going to pitch in college.
Outside of pitching lesson how much time or pitching reps does your A level 14U and up pitcher/s put in? Or is the extra time spent on strength,agility or/and conditioning training
My DD threw 4 to 5 days a week, about 40 weeks a year. Some practices would be longer than others. Many times during the winter (we lived in Chicagoland) the practice would be one hour long simply because we rented a tube at the local practice facility. When we were outside, she would practice about 90 minutes.