hydrophobia vs psychopathy

hydrophobia

noun
  • An aversion to water, as a symptom of rabies; the disease of rabies itself. 

  • A morbid fear of water; aquaphobia. 

psychopathy

noun
  • A personality disorder indicated by a pattern of lying, exploitation, heedlessness, arrogance, sexual promiscuity, low self-control, and lack of empathy and remorse. Violent and criminal offenses may be indicative of this disorder. 

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