conch vs speaker

conch

noun
  • A musical instrument made from a large spiral seashell, somewhat like a trumpet. 

  • A marine gastropod of the family Strombidae which lives in its own spiral shell. 

  • The shell of this sea animal. 

  • Synonym of concher (“machine used to refine the flavour and texture of chocolate”) 

  • The semidome of an apse, or the apse itself. 

verb
  • To refine the flavour and texture of chocolate by warming and grinding, either in a traditional concher, or between rollers. 

  • To play a conch seashell as a musical instrument, by blowing through a hole made close to the origin of the spiral. 

speaker

noun
  • A key on a woodwind instrument of the clarinet family (cf octave key on other instruments) which induces the instrument to overblow. 

  • Speakerphone. 

  • The literary character uttering the lyrics of a poem or song, as opposed to the author writing the words of that character. 

  • The producer of a given utterance, whether speech or text. 

  • The chair or presiding officer of certain legislative bodies, such as the U.K. House of Commons or the U.S. House of Representatives. 

  • A book containing passages of text for use in speeches. 

  • One who makes a speech to an audience. 

  • One who speaks. 

  • Loudspeaker. 

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