Weak Armor, Multi-Hit moves, & White Herbs??

Question

Weak Armor causes physical moves to lower the Pokémon's Defense and
increase its Speed stat by one stage each. It activates for each hit
of multi-hit moves.

Lets say im facing a Carracosta with Weak Armor and it is holding a White Herb. My Haxorus uses Dual Chop on it. Will the White Herb activate after the first hit or after both hits??

Answer 1

It will activate after the very first hit.

CREDIT TO RIO.