How much time is actually devoted to stamina and cardio by boxers of today?

[Scrap]

I'm guessing pro vs amateur means a difference in training just due to the rounds involved. That being said it has been 20 years since I have been in a boxing gym and back then we all trained the same. So I will shut up now and let more intelligent people contribute.

What I see things havent changed to much. Same old, but they have changed the names
.