Taking a break after experiencing a loss is indeed a wise option for every trader because every trader certainly needs to understand why he lost with the previous strategy so that in the next trade he can apply something slightly different so that we no longer experience losses in the same amount. Because losses are a part that is always present in any trading so that it cannot be separated permanently from trading work and I think the formula you offer is a pretty good step even though I will still say this is trading not gambling.
I also think it's a good point and as well even you are taking a break after having losses on the trading you must not waste your time.
I think in that time you have more important thing to do, because experiencing losses in trading and just taking break and after few times later start the trading again that will never going to bring any benefits, In the breaking period I think a trading should learn about their losses and how they get that loss and what are the mistakes they did that shouldn't be repeated again by them.