1) Are you asking why Chojuro is not attacking at least 2 times? Your question isn't clear. Chojuro has a passive when your skill break it where it will attack again if you kill one unit. You can easily kill one unit in team/elite/plot instance than in sage world since you are fighting actual people.

2) No she does not have skill breaks.

What kind 2 times? What nonsense? Do you even have Chojuro? In Team instanse he attacked 10 times in a row! What for him made breakthrough if this attacked only Team inst, Elite/Plot instans?

That is because as Danzo stated, Chojuro with breaks gains additional attacks when he kills a unit.

Like Danzō said it is very easy to kill units in Team instances and plot instances with his passive. You can see below his breakthroughs.

You shouldn't expect the same results when fighting real players because the difficultly is way higher.

Hello!

Just like what the other people said above. You just have to read his skillset to know the answer to your inquiry. Thank you.