よくある

expression, godan verb (-ru, irregular)

common; frequent; often the case

Used to describe something that happens often or is a common occurrence. Often appears in the pattern よくあること (a common thing).

• この辺あたりでは、地じ震しんはよくあることです。

  Earthquakes are a common occurrence around here.

• そんなミスはよくあるから、気きにしないで。

  That kind of mistake happens often, so don't worry about it.