quicksilver vs unpredictable

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. 

unpredictable

adj

  • Unable to be predicted. 

noun

  • An unpredictable thing. 

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