Pool pump duty cycle \ schedule
Some of this was discussed in your previous questions. The 8 hour run time in a generally accepted standard at least here in Florida. It is used to determine pump and filter size.  While once a day cycles limits transients, it hardly extends live of pump. The actual wet end usually fails before the motor, and it's easier and probably cheaper to replace the entire pump that mess around looking for a wet end only to find out the motor shaft has corroded threads.
Many power companies offer a time-of-use rate where you get a discount for running your pool pump from maybe 9PM to 5AM.