nine times out of ten
US /naɪn taɪmz aʊt əv tɛn/
UK /naɪn taɪmz aʊt əv tɛn/

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.
almost always; in most cases