chemically imbalanced vs schizophrenic

chemically imbalanced

adj
  • Mentally ill. 

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

schizophrenic

adj
  • Afflicted with schizophrenia; having difficulty with perception of reality. 

  • Having qualities that strongly jar or are at odds. 

  • Of or relating to schizophrenia. 

  • Exhibiting more than one personality; having a wildly changeable personality. 

noun
  • A person suffering from schizophrenia. 

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