I'm a sporatic shooter. that's because I don't have a car, so I have to rely on other people's schedules.
this ends up being once every couple months, and I *might* go through 100 rounds (mixture of 9mm and 5.56mm, with a tiny bit of 8mm mauser and 22lr)
I shoot more in the summer, due to weather (cold, wet, and muddy do not make happy shooting days ... that's what the infantry is for)