[Jtsummers]

This would depend on when you spend your review times. I do mine 2-3 times a day: morning with my coffee, around lunch, evening after dinner. Times that are otherwise mostly "idle" (if I'm doing anything else, it's browsing, reading a book, or watching a show). I do sometimes put together cards during the workday (I need to get back into this habit) after looking up something I don't know or couldn't recall but thought was worth committing to memory.

In the end, trying to remember everything would be silly and largely a waste. But memorizing those things that are common (but not daily) pain points would probably be an improvement over not. OTOH, I'm not going to quantify my time sufficiently to be able to provide clear evidence that it really speeds up my work.