cracked vs quicksilver

cracked

adj
  • Harsh or dissonant. 

  • Extremely good at something (usually a video game). 

  • Crazy; crackpot. 

  • Broken into coarse pieces. 

  • Broken so that cracks appear on, or under, the surface. 

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