pugnacity vs tiff

pugnacity

noun
  • The act or characteristic of being aggressive or combative. 

tiff

noun
  • A small argument; a petty quarrel. 

  • Liquor; especially, a small draught of liquor. 

verb
  • To have lunch. 

  • To quarrel. 

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