poster vs washboard

poster

verb
  • To decorate with posters. 

noun
  • An advertisement to be posted on a pole, wall etc. to advertise something. 

  • A shot that hits a goalpost, scoring one point. 

  • A shot that hits a goalpost instead of passing into the goal. 

  • A dunk over a defending player. 

  • A picture of a celebrity, an event etc., intended to be attached to a wall. 

  • One who posts a message. 

washboard

verb
  • To produce a rippled texture on a surface. 

  • To play a washboard. 

  • To move up and down or back and forth across the surface of a hive, possibly to lay down a layer of propolis and wax. 

noun
  • A stretch of ripples or bumps on a dirt or gravel road caused by interaction between traffic and road surface. 

  • A board fastened along a ship's gunwale to prevent splashing; a splashboard. 

  • Such a board used as a simple percussion instrument. 

  • A board with a corrugated surface against which laundry may be rubbed. 

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