clapboard vs clapper

clapboard

noun
  • A clapper board; a device used in film production, having hinged boards that are brought together with a clap, used to synchronize picture and sound at the start of each take of a motion picture or other video production. 

  • A narrow board, usually thicker at one edge than the other, used as siding for houses and similar structures of frame construction. 

  • Such boards, arranged horizontally and overlapping with thick edge down, collectively, as siding. 

verb
  • To cover with clapboards. 

clapper

noun
  • The hinged part of a clapperboard, used to synchronise images and soundtrack, or the clapperboard itself. 

  • A clapstick (musical instrument). 

  • A pounding block. 

  • A wooden mechanical device used as a scarecrow; bird-scaring rattle, a wind-rattle or a wind-clapper. 

  • The chattering damsel of a mill. 

  • An object so suspended inside a bell that it may hit the bell and cause it to ring; a clanger or tongue. 

  • A slapshot 

  • One who claps; a person who applauds by clapping the hands. 

verb
  • To make a repetitive clapping sound; to clatter. 

  • Of birds, to repeatedly strike the mandibles together. 

  • To ring a bell by pulling a rope attached to the clapper. 

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