Bill vs Norm

Bill

name

  • A diminutive of the male given name William. 

  • A nickname for the British constabulary. Often called "The Bill" or "Old Bill" 

  • A surname. 

Norm

name

  • A diminutive of the male given name Norman 

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