inconsistent vs quicksilver

inconsistent

adj
  • Not compatible (with another thing); incompatible, discrepant, at odds. 

  • Lacking internal consistency; self-contradicting; not compatible with itself. 

  • Not consistent or coherent in thought or behavior. 

  • Having the property that a contradiction can be derived. 

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. 

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