berserk vs suicidal

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”) 

suicidal

adj
  • Extremely reckless. 

  • Likely to commit, or to attempt to commit, suicide. 

  • Highly likely to certain to result in the deaths of the participants; dangerous or reckless to such a degree as to be tantamount to suicide for those taking part. 

  • Pertaining to suicide. 

noun
  • Someone suicidal; someone likely to kill themselves. 

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