Double check in Three check

In three check varrient if we give a double check to the opponent, will it count as 1 check or 2 checks in this varrient?

I've never experienced a game like that so I'm asking this question.

"A move is considered to give ONE check if the King is threatened, regardless if multiple pieces are giving the check (in the event of a double check)."
-- lichess.org/variant/threeCheck

it only counts it as one check...

Double check.... that reminds me of nine men's morris!