I shoot my 1911 at least once a month for IDPA. But I also go to the range quite often. Maybe once a week. At least once every two weeks. But I am shooting different guns on those trips. I try to put a few rounds through my cc gun every now and then just to stay proficient. I have been experimenting with several hunting rifles and different loads getting ready for elk hunting. So I have been to the range about 3 times in the last week plus the competition this last weekend.
I shoot once per week, weather permitting since I use an outdoor range. I have several pistols in my carry rotation so it works out that I'll practice with a particular one about once every two months.
For handgun, everyday I do dry work at the house (may miss one day per month). I make a trip to the range about 2-3 times per month. Less than I had the previous couple years but I try and make due with the time I have.
At my office we have a number of CCW holders (myself included ) and we have a standing date almost every Friday afternoon (we usually close down around 2:30 on Friday) that at least 2 or 3 of us make it to at a local indoor range about 2 miles from the shop..... So at least 2 to 3 times a month for me.... More if I can get a weekend in at the family farm next town over. BTW... the benefit of our close to the office range is that we've taken some newbies with us as well (...some who have never even held a firearm ever!!) and turned them onto the fun of shooting sports.... in the process created more of "us" and less of "them" !!!
Moral of the story is... Go to the range!! Go often!!! But if you can, take someone with you!!... especially someone who's never been!!