Best way to know would be running a ping/ms test and see the result yourself,after stunning someone you DO NOT get an amount of free hits,you get a small period of time to hit them(both after stunning because you have items and/or elixirs and stunning because your certain stunning-super-blow(s) felt like it),it's all up to you and your connection to how wisely you use it.
On the other hand,not every stunning object(elixir and/or item) is the same,some stun for 3 seconds,some stun for a longer period of time.
I am handing out equal judgment to everyone at an affordable rate, call me Fix Price,
When the king dies, make sure his grave is King-Size.