polemicize vs tiff

polemicize

verb
  • To engage in argument. 

tiff

verb
  • To quarrel. 

  • To have lunch. 

noun
  • A small argument; a petty quarrel. 

  • Liquor; especially, a small draught of liquor. 

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