fluctuant vs quicksilver

fluctuant

adj
  • That fluctuates or causes fluctuation. 

  • Used to describe a fluid-filled structure, such as an abscess, that produces a wave-like motion when palpated. 

quicksilver

adj
  • Unpredictable, erratic or fickle; mercurial. 

verb
  • To overlay with quicksilver. 

  • To treat with quicksilver. 

noun
  • The metal mercury. 

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

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