CHiP vs porker

CHiP

noun
  • An officer of the California Highway Patrol 

porker

noun
  • A police officer. 

  • A lie. 

  • A pig, especially a castrated male, being fattened and raised for slaughter. 

  • An obese person. 

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