Usually go twice a month (every other weekend) and shoot around 250 rounds. Sometimes more, sometimes less. I don't see the point of just shooting 50 rounds on a range trip unless your shooting long range marksmanship. If I were shooting something as expensive as 6.5 Creedmore yeah, but 9mm?
You aren’t limited to shooting 50 rounds at the range. You only get to count 50 of those rounds from each trip towards the 1000 round total. So, for instance a trip to the range every two weeks where you shoot at least 50 rounds would get you to 1k and you’d even have time to take a vacation.
I could shoot two bricks of 22lr on one trip to the range which would be fun and be 1k rounds, but I wouldn’t necessarily get the same benefit that I might get by shooting a minimum of 50 rounds every other week.
Like going to the gym, eating healthy or drinking a cold beverage with buddies… it’s better if you do it consistently.