ague vs quaver

ague

noun
  • A chill, or state of shaking, as with cold. 

  • The cold fit or rigor of the intermittent fever 

  • An intermittent fever, attended by alternate cold and hot fits. 

verb
  • To strike with an ague, or with a cold fit. 

quaver

noun
  • A trembling shake. 

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

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

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 ague and quaver occurred in a corpus of books? (source: Google Ngram Viewer )