billboard vs handbill

billboard

noun
  • A piece of thick plank, armed with iron plates, and fixed on the bow or fore-channels of a vessel, for the bill or fluke of the anchor to rest on. 

  • A very large outdoor sign, generally used for advertising. 

  • A sprite that always faces the screen, no matter which direction it is looked at from. 

handbill

noun
  • A chopping instrument; billhook. 

  • A loose printed sheet, to be distributed by hand. 

  • A pruning hook. 

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