quicksilver vs wavering

quicksilver

adj
  • Unpredictable, erratic or fickle; mercurial. 

noun
  • The metal mercury. 

  • An amalgam of mercury and tin applied to the backs of mirrors, quicksilvering. 

verb
  • To overlay with quicksilver. 

  • To treat with quicksilver. 

wavering

adj
  • Fluctuating, uncertain, undetermined, unsteady. 

  • Being in doubt; indecisive. 

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