I don't know about range time, but I shoot my 870 most because I hunt with it a lot.
Dove, Quail, Chukker, Pheasant and a little Crow hunting thrown in.

10-22 comes in second again because of Squirrel shootin.

Glock 23/AR15 are probably tied for third because I go to the Sheriff's range to train/qualify 4 times a year for a total of 12 hours.

Rem 700 6mm and Rem 700 .270 are what I use Coyote and Deer hunting respectively but there is more huntin than shootin.

Side by side 20 ga is next because I take her out quail hunting every now and again.
Ruger MkII 512 is in there also somewhere and a few others.

M1 Carbine
Glock 17

AR and USP

HK usp tactical in .45 and my usp compact in .45 (my carry piece)

Ive been load testing 45ACP, so I would have to say this




and this is fun blaster

XD-9 and AK

92FS x2 but take other guns out frequently because I have to relieve the mag springs or shoot dusty ammo or have more of a reason to clean the gun.  Sometimes I just get sentimental and  need to hear the sweet sound of gunfire and smell the rich aroma of gunpowder...something similar to stop and smell the roses...