よくあること

expression, noun

common occurrence; everyday thing; not unusual

Used to state that something happens often or is nothing special. Often appears in explanatory or reassuring contexts.

See also: よくある

• 日本にほんでは地じ震しんはよくあることです。

  Earthquakes are a common occurrence in Japan.

• そんなミスはよくあることだから気きにしないで。

  That kind of mistake is a normal thing, so don't worry about it.