mortality vs trauma centre

mortality

noun
  • The state of being susceptible to death. 

  • The number of deaths per given unit of population over a given period of time. 

  • Death. 

  • Deaths resulting from an event (such as a war, epidemic or disaster). 

trauma centre

noun
  • A specialized section of a hospital intended to treat suddenly occurring life-threatening injuries and medical conditions. 

  • A type of hospital with a highly capable trauma department. 

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