circumstance vs trauma centre

circumstance

noun
  • Circumlocution; detail. 

  • An event; a fact; a particular incident. 

  • Something which is related to, or in some way affects, a fact or event. 

  • Condition in regard to worldly estate; state of property; situation; surroundings. 

verb
  • To place in a particular situation, especially with regard to money or other resources. 

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