I probably average about half a check per month for miscellaneous, not any regular bill. I have an eccentric friend who says he likes writing checks, and probably averages more than one per day.
2-4 a month. I may write one, my wife does 2-3.
More during the school year since a lot of the kids things are easier to pay by check (and they charge more if paying by CC, and don't have direct withdraw option).
I bought 500 checks several years ago and have about 1/3 left.
I write one at least once a week - the daycare I take the kids to takes checks and I pay them once a week. The garbage collection company also only takes checks - no online bill pay available, so I write a check to them once a month. Annual car taxes are also paid by check, to avoid a surcharge for using a credit card online. Everything else is paid online or with a credit card.
I don't give strangers a check that has my account # and routing number at bottom! For strangers I use USPS money orders, safer, more secure than cash!