Every something must be referenced exactly num:d time(s) by the loops of the face
Usages:
Then Every edge must be referenced exactly 2 time(s) by the loops of the face
Then Every oriented edge must be referenced exactly 1 time(s) by the loops of the face
Then Every edge must be referenced exactly 2 time(s) by the loops of the face
Then Every oriented edge must be referenced exactly 1 time(s) by the loops of the face