flitter vs quaver

flitter

noun
  • A small perceptible feeling 

  • Any of various hesperiid butterflies of the genus Hyarotis. 

  • A fluttering movement 

  • A small aircraft or spacecraft. 

  • A rag; a tatter; a small piece or fragment. 

verb
  • To scatter in pieces. 

  • To flutter or quiver. 

  • To move about rapidly and nimbly. 

  • To move quickly from one condition or location to another. 

quaver

noun
  • A trembling of the voice, as in speaking or singing. 

  • A trembling shake. 

  • an eighth note, drawn as a crotchet (quarter note) with a tail. 

verb
  • To shake in a trembling manner. 

  • To use the voice in a trembling manner, as in speaking or singing. 

  • To utter quaveringly. 

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