If you cycle a male through multiple females your male does need rest weekly during that time it will be fed and rested.
The rest really depends on how many females you want to cycle him through.
My goal is to make sure that my males gets around my females at least once a month if I witness lock or twice if I do not. I pair my animals when the time is right (using the weather, when my females start building etc) and I keep them together for 48 hours max, so in general my males are paired 8 days out of the months (I try to maintain a 1.4 ratio), however some maybe paired more if I have more females or less.
There is no need to waste or exhaust a male pairing him 3 days at the time each week with the same female. You just witness a lock leave him be until next month and next month use the weather at your advantage when you pair.