Fan vs Fay

Fan

name
  • A diminutive of Frances. 

  • A surname from Mandarin 

  • A county of Puyang, Henan, China. 

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.) 

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