I have a range membership at the LGS. Generally I try to shoot every week (it's an indoor range just a few miles from my house) but realistically I'm lucky to get there every other, and sometimes it's every third. When I get especially busy and hit the range after a longer absence it's always disconcerting how much the "rust" shows. Pistol shooting is a peculiarly perishable skill and it quickly degrades without regular practice.