flutter vs plop

flutter

noun
  • A state of agitation. 

  • The rapid variation of signal parameters, such as amplitude, phase, and frequency. 

  • A small bet or risky investment. 

  • The act of fluttering; quick and irregular motion. 

  • An extremely dangerous divergent oscillation caused by a positive feedback loop between the elastic deformation of an object and the aerodynamic forces acting on it, potentially resulting in rapid structural failure. 

  • A hasty game of cards or similar. 

  • An abnormal rapid pulsation of the heart. 

verb
  • To be in a state of agitation or uncertainty. 

  • To subject to a lie detector test. 

  • Of a winged animal: to flap the wings without flying; to fly with a light flapping of the wings. 

  • To flap or wave quickly but irregularly. 

  • To undergo divergent oscillations (potentially to the point of causing structural failure) due to a positive feedback loop between elastic deformation and aerodynamic forces. 

  • To cause something to flap. 

  • To drive into disorder; to throw into confusion. 

plop

noun
  • Excrement. 

  • A sound or action like liquid hitting a hard surface, or an object falling into a body of water. 

intj
  • Indicating the sound of something plopping. 

verb
  • To make the sound of an object dropping into a body of liquid. 

  • To defecate. 

  • To land heavily or loosely. 

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