broadside vs letterhead

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. 

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

verb
  • To collide with something side-on. 

letterhead

noun
  • Paper marked with a letterhead. 

  • A portion of text at the top of a letter, identifying the sender and often giving their address etc., used for formal correspondence. 

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