billboard vs sway

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. 

sway

noun
  • A switch or rod used by thatchers to bind their work. 

  • The act of swaying; a swaying motion; a swing or sweep of a weapon. 

  • Preponderance; turn or cast of balance. 

  • Rule; dominion; control; power. 

  • The maximum amplitude of a vehicle's lateral motion. 

  • A rocking or swinging motion. 

  • Influence, weight, or authority that inclines to one side 

verb
  • To influence or direct by power, authority, persuasion, or by moral force; to rule; to govern; to guide. Compare persuade. 

  • To move or wield with the hand; to swing; to wield. 

  • To bear sway; to rule; to govern. 

  • To hoist (a mast or yard) into position. 

  • To be drawn to one side by weight or influence; to lean; to incline. 

  • To have weight or influence. 

  • To cause to incline or swing to one side, or backward and forward; to bias; to turn; to bend; warp. 

  • To move or swing from side to side; or backward and forward; to rock. 

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