Just bleeding the line for a fuel leak doesn't take long (or hasn't for me). That has been as little as 5 - 10 pumps.
Priming after replacing the cartridge in the fuel/water separator did because that little pump had to fill the bowl of that separator. Lot of pumps for that much volume of fuel.
Also, you should feel two "stages" in the pump. The first part of the throw has very little resistance. Then you will have a second part that resists a little more. Push the lever through both stages on each pump.