adversity vs trauma centre

adversity

noun
  • The state of adverse conditions; state of misfortune or calamity. 

  • An event that is adverse; calamity. 

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 adversity and trauma centre occurred in a corpus of books? (source: Google Ngram Viewer )