Muffin vs Nan

Muffin

name

  • A female given name. 

  • A surname. 

Nan

name

  • A diminutive of the female given name Ann and Nancy. 

  • A province of Thailand. 

  • A city in Thailand. 

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