ad vs affiche

ad

prep
  • to, toward 

noun
  • advantage 

affiche

noun
  • A written or printed notice to be posted, as on a wall; a poster; a placard. 

verb
  • To fix, fasten; to fix a poster or placard to a wall. 

  • To parade, to advertise, publicise; to display, show. 

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