The number nine is easily divided by three.  There are three threes in a nine.

The trinity is three, Father, Son, and Holy Ghost.  There are three persons in one, there are three joined trinities in nine.

The number nine is used to invoke the Archangel at certain churches communion services.

The number nine is not even that is it can not be paired in sets of two, it is always odd.

The number nine is used as a coven number to imitate the Christian service.

The double of nine is eighteen, the number of the harlot in Revelations.

The double of nine, eighteen, can be divided into nine sets of two.