chemically imbalanced vs twisted

chemically imbalanced

adj
  • Mentally ill. 

  • Used other than figuratively or idiomatically: see chemically, imbalanced. 

twisted

adj
  • Mentally disturbed or unsound. 

  • Wound spirally. 

  • Contorted. 

  • Under the influence of multiple intoxicants, usually alcohol and marijuana. 

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