An expression meaning 'to occur often' or 'to be common.' Widely used in everyday speech to indicate something is typical or frequently seen.
このタイプのミスは試験ではよくあるので注意しよう。
This type of mistake is common on the exam, so be careful.
遅延はよくあることだが、長時間の遅れには連絡をしてほしい。
Delays are common, but I want you to contact me if the delay is long.
彼が緊張して言葉を詰まらせるのはよくあることだ。
It's common for him to get nervous and stumble over his words.
この現象は都市部ではよくあるが、地方では珍しい。
This phenomenon is common in urban areas but rare in rural regions.