bellflower vs clapper

bellflower

noun
  • A flower of one of these plants, which is shaped like a bell. 

  • Any flowering plants in the genus Campanula. 

  • Flowering plants in the genera, Campanulastrum, Codonopsis, or Platycodon, in the family Campanulaceae. 

  • Any flowering plant in genus Uvularia. 

clapper

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

  • 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. 

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

  • 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 bellflower and clapper occurred in a corpus of books? (source: Google Ngram Viewer )