How often do you guys start your car over winter storage?

My cars are stored inside, but I have choices on which one to drive and when.

If one has sat more than a month, I top up the fuel bowl in the carb through the vent. I use a rinsed out Frenches Mustard bottle.

I also use non-methanol gas in all my cars.

I have battery kill switches, so no need for 'battery maintainers' or the extra cost to run them on my electric bill.

(Two of my cars have OE clocks, so they can drain a battery over time)