berserk vs swivel-eyed

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”) 

swivel-eyed

adj

  • Fanatical, deranged. 

  • Having a squint. 

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