amok vs berserk

amok

noun
  • The act of running amok. 

  • One who runs amok; in Malay and Moro/Philippine culture, one who attempts to kill many others, especially expecting that they will be killed themselves. 

verb
  • Synonym of run amok 

adv
  • In a frenzy of violence, or on a killing spree; berserk. 

  • Out of control, especially when armed and dangerous. 

berserk

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

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

  • Bizarre; weird. 

  • Wildly joyous; ecstatic. 

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