Madonna vs Sissy

Madonna

name

  • A female given name from Italian. 

  • The Virgin Mary, the mother of Jesus. 

noun

  • An artistic representation of the Virgin Mary, chiefly when holding the infant Jesus. 

  • A morally pure woman. 

Sissy

name

  • A diminutive of the female given name Cecilia. 

How often have the words Madonna and Sissy occurred in a corpus of books? (source: Google Ngram Viewer )