I voted 15-30. But...
My CZ 452 takes like five minutes. I run ONE solvent-loaded patch down the bore, load up ONE patch with solvent and wipe off the action and shimmy it around the crown area with my pinky, and then run ONE dry patch down the bore. The action doesn't get very dirty, and overcleaning .22 barrels is unhealthy anyway. I pretty much do it to get hte fouling off.
My FN-49 takes a good 30~45 minutes. I run a few Windex patches down the bore until they come out gray and not black/chunky. I do the same with the gas tube. I then run a couple of dry patches down both. And then I go in with solvent patches until the bore and gas tube are shiny-shiny. And then I wipe down the bolt, bolt carrier, and action.
My Mosins and Mausers take 15~30, most of which is just running a whole bunch of patches down the bores until they're nice and shiny. And then I wipe down the bolts. Mausers, I'll usually go ahead and disassemble the bolts entirely (because it's relatively simple), and wipe down as appropriate; Mosins, I'll separate the bolt heads and wipe those downs.