Crackpot vs Muff

Crackpot

name
  • A village in Swaledale, North Yorkshire, England 

Muff

name
  • A village in County Donegal, Ireland 

  • A surname. 

  • An unincorporated community in Armstrong County, Pennsylvania, United States 

  • A diminutive of the female given name Myfanwy 

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