A Mistake
Mistake
noun
We waited an interval of time, and at each interval it was different. They're all supposed to be the same. Is there some kind of mistake?
Take the reading of 間 (ま from 間に合う) and 違う and you'll have the reading for this word too.
新しい市場に参入したことは間違いじゃなかった。
Expanding into new markets was not a mistake.