Charger vs pin-up

Charger

noun
  • A member of the Los Angeles Chargers. 

pin-up

noun
  • The person so depicted. 

  • A photograph, printed in a magazine or other publication, of a sexually attractive person (often nude or provocatively dressed), and intended to be removed and pinned up on a wall. 

  • Figurehead, person who represents an idea, cause etc. 

How often have the words Charger and pin-up occurred in a corpus of books? (source: Google Ngram Viewer )