chemically imbalanced vs psychoneurotic

chemically imbalanced

adj

  • Mentally ill. 

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

psychoneurotic

adj

  • Pertaining to or suffering from a psychoneurosis. 

noun

  • Someone suffering from a psychoneurosis. 

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