Pat vs Pinhead

Pat

noun

  • An Irish person. 

name

  • A diminutive of the female given name Patricia. 

  • A diminutive of the male given name Patrick. 

  • A surname. 

Pinhead

noun

  • A member of the Provisional IRA. 

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