How is “even out” used?

In The Way Way Back (2013), one line is: “We could grab Kip and Joan and make an evening out of it.”

Which movie is “even out” from?

The clip at the top of this page is from The Way Way Back (2013).

We could grab Kip and Joan and make an evening out of it.

8 作品で登場 · 1 本目

to become level or steady, usually after varying a lot; to spread things equally over a period of time or among a number of people

7 本の映画に登場

1
to become level or steady, usually after varying a lot
House prices keep rising and falling but they should eventually even out.
2
even sth out
to spread things equally over a period of time or among a number of people
He tried to even out the distribution of work among his employees.

定義：Oxford Advanced Learner's Dictionary 第 9 版