How often do you run these tests?

Free Chlorine
Combined Chlorine
pH
Total Alkalinity
Calcium Hardness
CYA

Also, how often do you run your filter/pump, and for how long? We have the 1000 (or maybe 800) gallon-per-hour Intex cartridge filter, for our approximately 5000 gallon above-ground, metal-framed pool. We now have a timer, so we can set it to run however long and/or often we want to run it.

Thanks for any advice!