Zephyr Strike spell, does the caster get Advantage once/turn?

@JeremyECrawford For the Zephyr Strike spell, does the caster get Advantage once/turn, or only once? pic.twitter.com/quLybo5Ppd

— The Doctor (@COBigBlueBox) January 5, 2018

Once.

— Jeremy Crawford (@JeremyECrawford) January 5, 2018