Talking about how quickly forget loss depend have capital for deposit and get win or not? if don't have capital seems get longer time forget loss if after redepositing again and win bigger than loss easily forget loss. However for gambler allocated how much for gambling and its easily forgetting loss when betting but not get win. If you use fund deposit without allocated how much I think difficult you can forget how much loss and actually need day by day forgetting how much have losses.
For experience gamble its normal about how much loss and win, its not matter for them one day loss because the next will win so easily forgetting when loss position.
It's not always about experience, sometimes even experienced gamblers might find it difficulty to forget about a loss, this happens when they gamble with an amount of money that they cannot afford to lose. Experience doesnt cover everything most times this is the reason why it's emphasized constantly for gamblers to always stake what they can afford to lose