broadside vs placard

broadside

noun
  • A large sheet of paper, printed on one side and folded. 

  • The printed lyrics of a folk song or ballad; a broadsheet. 

  • A forceful attack, be it written or spoken. 

  • One side of a ship above the water line; all the guns on one side of a warship; their simultaneous firing. 

verb
  • To collide with something side-on. 

adv
  • Sideways; with the side turned to the direction of some object. 

placard

noun
  • A sheet of paper or cardboard with a written or printed announcement on one side for display in a public place. 

  • A kind of stomacher, often adorned with jewels, worn in the fifteenth century and later. 

  • An extra plate on the lower part of the breastplate or backplate of armour. 

  • The woodwork and frame of the door of a closet etc. 

verb
  • To announce with placards. 

  • To affix a placard to. 

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