for; during, during; while, interval; pause, between ... and ...
Every morning, while he ate breakfast, his dog would stare intently at him.
He suggested it while his uncle was visiting the mine during the next full moon.
— お嬢さん (2016)
You ran away from school before we even had a chance to get to know each other.
— レオン (1994)
Before I had a chance to recover, I came down with another terrible cold.