casualty vs traumatology

casualty

noun
  • The accident and emergency department of a hospital providing immediate treatment; a casualty department or emergency room. 

  • Something that happens by chance, especially an unfortunate event; an accident, a disaster. 

  • An incidental charge or payment. 

  • A person in military service who becomes unavailable for duty, for any reason (notably death, injury, illness, capture, or desertion). 

  • A person suffering from injuries or who has been killed due to an accident or through an act of violence. 

  • Specifically, a person who has been killed (not only injured) due to an accident or through an act of violence; a fatality. 

  • Someone or something adversely affected by a decision, event or situation. 

traumatology

noun
  • A branch of medicine that deals with the diagnosis and treatment of trauma. 

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