quicksilver vs two-timing

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. 

two-timing

adj

  • Sexually or romantically unfaithful. 

noun

  • The practice of being sexually or romantically unfaithful. 

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