danger vs trauma centre

danger

noun
  • Exposure to likely harm; peril. 

  • An instance or cause of likely harm. 

  • The stop indication of a signal (usually in the phrase "at danger"). 

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