Animations timing

Hey, pals, I kept wondering whether I can get some info about how long animation takes to make a full circle from the start to the end. Any ideas on how-to? Any way to measure it via some custom stock? It is quite necessary for me so my animation system don't get partially broken by my chat animations system.

Please answer as fast as you know if you happen to know how-to's. It's kind of rushy matter for me. Thanks.