rumble vs wah-wah

rumble

verb
  • To make a low, heavy, continuous sound. 

  • To move while making a rumbling noise. 

  • To fight; to brawl. 

  • to provide haptic feedback by vibrating. 

  • To cause to pass through a rumble, or polishing machine. 

  • To discover deceitful or underhanded behaviour. 

noun
  • A street fight or brawl. 

  • A rotating cask or box in which small articles are smoothed or polished by friction against each other. 

  • A low, heavy, continuous sound, such as that of thunder or a hungry stomach. 

intj
  • An onomatopoeia describing a rumbling noise 

wah-wah

verb
  • to make a wah-wah sound 

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

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

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

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