Enhancing time taken to answer

Is it possible to create an option where it tells you how long it took to press “Show Answer”?

Right now, the timer continues counting even after the pressing “Show Answer”

By creating such option, it will increase the accuracy of determining whether a card is too long/difficult.

You could either change the current one, or alternatively, add a new feature so you will have one that counts even when “Show Answer” is pressed and one that does not.

Opinions?