かわりばんこに
alternately; by turns; in turn; one after the other
Also written 代わり番こに
Adverb
彼かれらは代かわりばんこに運転うんてんした。
They took turns driving the car.
トムとメアリーは代かわりばんこに車くるまを運転うんてんした。
Tom and Mary took turns driving the car.