CHiP vs tit

CHiP

noun
  • An officer of the California Highway Patrol 

tit

noun
  • A police officer; a "tithead". 

  • A person's breast or nipple. 

  • A chickadee; a small passerine bird of the genus Parus or the family Paridae, common in the Northern Hemisphere. 

  • An idiot; a fool. 

  • A morsel; a bit. 

  • A mammary gland, teat. 

  • Any of various other small passerine birds. 

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