nine times out of ten

US /naɪn taɪmz aʊt əv tɛn/
UK /naɪn taɪmz aʊt əv tɛn/
"nine times out of ten" picture
1.

almost always; in most cases

:
Nine times out of ten, he's late for meetings.
If you try that recipe, nine times out of ten it will turn out great.