berserk vs quicksilver

berserk

adj
  • Furiously, injuriously, or maniacally violent or out of control. 

  • Bizarre; weird. 

  • Wildly joyous; ecstatic. 

noun
  • Synonym of berserker (“a Norse warrior who fought in a frenzy”) 

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