hospital vs trauma centre

hospital

noun
  • A large medical facility, usually in a building with multiple floors, where seriously ill or injured patients are given extensive medical and/or surgical treatment. 

  • A building founded for the long-term care of its residents, such as an almshouse. The residents may have no physical ailments, but simply need financial support. 

trauma centre

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

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

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