Fay vs Sissy

Fay

name
  • A female given name, pet form of Faith or Frances; often used as a middle name. 

  • An Anglo-Irish surname transferred from the nickname, Anglicized from de Fae a Norman family that settled in Ireland. 

  • A surname from Irish, anglicized from Ó Fiaich and Ó Fathaigh. (see Fahey.) 

Sissy

name
  • A diminutive of the female given name Cecilia. 

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