How is “like as not” used?

In Unforgiven (1992), one line is: “... like as not he'll kill you.”

Which movie is “like as not” from?

The clip at the top of this page is from Unforgiven (1992).

Idiom

quite probably

old-fashioned · Heard in 1,132 movies

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

... like as not he'll kill you.

Said in 8 films · #1