drone vs wah-wah

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. 

wah-wah

noun
  • A wavering sound produced by means of a movable mute or by electronic means 

adj
  • Modifying the resonance of musical notes to produce the effect of a human voice. 

intj
  • The sad trombone sound, used to indicate failure or disappointment. May be used mockingly; also written wah wah and womp womp. 

verb
  • to make a wah-wah sound 

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