tweep vs wah-wah

tweep

verb
  • To chirp or beep. 

  • To kill; to assassinate. 

noun
  • A Twitter employee. 

  • A user of the Twitter microblogging service. 

  • A chirp or beep. 

wah-wah

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

verb
  • to make a wah-wah sound 

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. 

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