Has anyone put a switch on a refrigerator defrost heater?

i have not done anything to mine
but several other members have
according to the wiring diagram mine is a motorized timer, since we full time i just left it alone, i don't know how often it cycles

someone once posted 10 minutes every 10 hours
IDK, but i;ve never been much concerned about, and we dry camp 95 percent of the time
right now the fridge is empty and turned off, the RV is at the diesel shop

despite CPU technology
NOT everything has a CPU chip in it