Wait, doesn't period itself already refer to "a period of happening" aka periodically? Your pun is basically like saying "well you could say retarded is retarded"

A period references to: any specified division or portion of time, but also: the occurence of menstruation aka a "period".

And I made a pun based on the word "periodically" referencing to menstruation coming back once a month.

Picture is relevant though

...I do understand what you're referring to. But period as in menstruation is already a word extracted due to it referring to a "period of time". Your pun is non existent, you're just repeating the definition of the word.

This

Alright then :^(

"and thus the pun stands"