代かわり合あう

godan verb (-u), intransitive verb

take turns; relieve each other

Used when two or more people alternate doing something, often to share a burden or task. Implies mutual substitution.

• 長ながいドライブの間あいだ、二人ふたりで代かわり合あって運うん転てんした。

  During the long drive, the two of us took turns driving.

• 仕し事ごとが大たい変へんなので、みんなで代かわり合あって休きゅう憩けいを取とろう。

  The work is tough, so let's all take turns taking breaks.