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
Earthquakes are a common occurrence in Japan.
That kind of mistake is a normal thing, so don't worry about it.
Kanji spelling for よく; less common than kana.
Phrase composed of よく (adverbial form of 良い, 'good') + ある ('to exist') + 事 ('thing'). Literally 'a thing that often exists/happens'.