hydrophobia vs rabies

hydrophobia

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

  • A morbid fear of water; aquaphobia. 

rabies

noun
  • An infectious disease caused by species of Lyssavirus that causes acute encephalitis in warm-blooded animals and people, characterised by abnormal behaviour such as biting, excitement, aggressiveness, and dementia, followed by paralysis and death. 

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