nine times out of ten

Từ điển Oxford Advanced Learner 8th

▪ I. ˌnine times out of ˈten idiom
almost every time
• I'm always emailing her, but nine times out of ten she doesn't reply.
Main entry: ↑nine_idiom
 
▪ II. ˌnine times out of ˈten | ˌninety-ˌnine times out of a ˈhundred idiom
used to say that sth is usually true or almost always happens
•Nine times out of ten she gives the right answer.
Main entry: ↑time_idiom