Bloody Mary vs on the rag

Bloody Mary

name

  • A ghost, witch or demonic spirit said to appear in a mirror if her name is chanted repeatedly. 

  • Mary I of England 

on the rag

prep

  • Menstruating. 

  • In a bad mood. 

How often have the words Bloody Mary and on the rag occurred in a corpus of books? (source: Google Ngram Viewer )