I am not sure a poll makes sense here. Different pools, number of swimmers, organic load, sun exposure, climate, pool maintainer experience, cya level, pool surface type, and many other factors make each pool different.
Generally, on my pool I test approximately every other day with the OTO/ph test and weekly with the fas-dpd test. I test monthly for TA. I test once a year at the beginning of the season for CH, Borates and Salt(I actually test twice, first right after refill and then about a week after adjusting). There are other times I test some of the above parameters when I have a concern or am "doing an experiment".
I watch my water carefully, and my children are quite aware of when the water is "off" and tell me right away :grrrr: