billboard vs headline

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. 

headline

noun
  • A headrope. 

  • The heading or title of a magazine or newspaper article. 

  • The top-billed attraction. 

verb
  • To present as the main attraction; to have top billing, to be the main attraction. 

  • To give a headline to a page or section of a text. 

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