1
general::
Phrase(s): more often than not
Fig. usually. • These flowers will live through the winter more often than not. • This kind of dog will grow up to be a good watchdog more often than not.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, often as not. Fairly frequently, more than or at least half the time, as in More often than not we'll have dinner in the den, or Dean and Chris agree on travel plans, often as not. [First half of 1900s]
American Heritage Idioms