I think you are mixing up terms a little. A turnover is pumping the same number of gallons as there are in the pool. Typically you design the system for two to three turnovers a day if the pump is run on high speed for all 24 hours. Typically the pump isn't actually run that long, it is only run 8 to 12 hours a day, so 2/3rds to 1.5 turnovers per day actual.
The SWG on the other hand requires a minimum flow rate and a minimum number of hours per day, but it doesn't really care how that works out in turnovers. A SWG might require something around a minimum of 20 GPM. It may also require a minimum pump run time of four to six hours, though that varies more depending on the relative size of the SWG compared to the pool. A pool heater has the same issues, a minimum flow rate and a minimum number of hours per day of pump run time.
The flow rate depends on the size of the pump, which speed you are running it on, and numerous details of the plumbing. Even on low speed many, but not all, two speed systems will get at least 20 GPM. Figuring that out is possible but can get a little tricky unless you have a flow meter.