I remember hardly any enemas until age 9, then the flood gates opened (ha!). Breaking it down by age...
(All numbers are my best guesstimate)
Age 9: 24 (Average 2/week for 3 months whereupon I turned 10)
Age 10: 78 (1/week for sure, plus some extras mid-week)
Age 11: 65 (1/week for sure, plus fewer extras mid-week)
Age 12: 40/12 (40 from a parent, 12 were self-administered without my parents knowledge)
Age 13: 20/20 (Parent enemas end, self-administered WITH parents knowledge begins, plus others without)
Age 14: 40 (All enemas self administered, but at least half were 'sneaked')
Age 15: 20 (1/month with parents knowledge, plus others)
Age 16: 20 (4/year with parents knowledge, plus others)
Age 17: 20 (similar to age 16)
Adding that all up yields a total of (about) 319.
Very few during college years (except summers at home). Picked-up again when I was living independently.