In all fairness - it depends on the school and the program officers.
Would you feel better if I said once a week?
I'd feel better if you were a bit less condescending about the whole thing.
I spent 30-40 hours a week for three years outside my regular classload with ROTC duties. That didn't include the summer events -- Basic Camp, Advanced Camp, and Airborne school. I also had five hours of required classroom time every week - just like every other ROTC cadet in the country.