consistent vs quicksilver

consistent

noun
  • A kind of penitent who was allowed to assist at prayers, but was not permitted to receive the holy sacraments. 

  • Objects or facts that are coexistent, or in agreement with one another. 

adj
  • Of a regularly occurring, dependable nature. 

  • Of a set of statements: such that no contradiction logically follows from them. 

  • Compatible, accordant. 

quicksilver

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. 

adj
  • Unpredictable, erratic or fickle; mercurial. 

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