Venus Cycles and the Purification

https://earthsky.org/astronomy-essentials/five-petals-of-venus/

A complete Venus cycle takes 8 years. Every 8 years Venus returns to the same place she started around the same date. The pattern she makes forms a five sided figure they call the petals of Venus. Each relative position of the Earth, Venus, and the Sun occurs five times, and then repeats five more times identically within the 8 year cycle.