perverse vs quicksilver

perverse

adj
  • Obstinately in the wrong; stubborn; intractable. 

  • Morally wrong or evil; wicked; perverted. 

  • Turned aside while against something, splitting off from a thing. 

  • Ignoring the evidence or the judge's opinions. 

  • Wayward; vexing; contrary. 

verb
  • To pervert. 

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 perverse and quicksilver occurred in a corpus of books? (source: Google Ngram Viewer )