We had a long discussion in http://tools.oasis-open.org/issues/browse/OFFICE-1689 about this attribute but missed the use of "modulo."
From what I have found, for example:
So the remainder of 24 modulo 24 is 0.
So the remainder of 48 modulo 24 is 0.
So the remainder of 72 modulo 24 is 0.
That can't be what we meant.
Rather I think we meant to have the quotient plus any remainder.
Apologies for missing this in our prior discussion. It seems so clear now.