drone vs speaker

drone

noun
  • A humming or deep murmuring sound. 

  • One of the fixed-pitch pipes on a bagpipe. 

  • One who performs menial or tedious work. 

  • A person without the ability to think critically and independently, especially one who follows a group blindly; a non-player character. 

  • A remotely controlled aircraft, an unmanned aerial vehicle (UAV). 

  • A Toyota HiAce or a similar van, especially one used by Ugandan state agents to kidnap opposition members. 

  • A male ant, bee or wasp, which does not work but can fertilize the queen. 

  • A genre of music that uses repeated lengthy droning sounds. 

  • A low-pitched hum or buzz. 

verb
  • To speak in a monotone way. 

  • To produce a low-pitched hum or buzz. 

  • To kill with a missile fired by unmanned aircraft. 

speaker

noun
  • Loudspeaker. 

  • 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. 

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

  • One who makes a speech to an audience. 

  • One who speaks. 

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