On a general observation, we may not be able to quantify how often we are winning while gambling, not because there is no history record to take, but because we may get discouraged after discovering that we often loose in gambling than we win, so i don't see any benefits in it knowing the rate at which we lose to that of the ones we often won, this is gambling and we should know for that reason, we are more liable to lose than winning, but at the end, we gain being entertained.
This is quite true because if you notice closely a majority of Gambling activities have a great percentage of luck involved in other for the Gambling to win a stake. And however, although wins can happen often, losses are also something you really can't avoid a hundred percent of the time. Therefore as gamblers win so also they may lose along the way sometimes. I think one of the most important things to take note of is to make sure that even if losses come sometimes, there should also be a couple of wins too to prevent a gambler from running into a gross loss.
The truth is even if no one likes to lose, we still lose some of the time especially when luck doesn't fall on the side of the gambler. I think this is part of the reasons some gamblers end of switching to a different game or pausing Gambling for a while when they've lost too frequently.