as a rule

Adverb

idiomatic

(idiomatic) In general; most often.

Japanese Meaning

一般的に / 大抵の場合 / 通常は

As a rule, restaurants in this area close by 10 p.m., so we should plan accordingly.

一般に、この地域のレストランは午後10時ごろまでに閉まるので、予定を立てる際はそれを考慮しましょう。

Sense（1）

(idiomatic) In general; most often.

We go fishing every Sunday as a rule, but today the lake is frozen.