Are these phrases often used often in English?

"Till next time" [yes, but some native speakers say "Until next time"] 
"Until we meet again"
"I didn’t mean to"
"This is an outrage"
"No way!"
"Not a bit!"
"Exactly so" [Normally we just say "Exactly!"]
"It can hardly be so" [This is very archaic, and most people will say "That can't be right!"]

Are they popular? Some of these phrases might be used by natives almost every day. And this is an excellent way to learn English. Well done.

Are these phrases often used in English?

Are these phrases often used in English?

"Till next time"
"Until we meet again"
"I didn’t mean to"
"This is an outrage"
"No way!"
"Not a bit!"
"Exactly so"
"It can hardly be so"

Are they popular?

Yes they are ALL popular in the US