inquiry vs postoperative

inquiry

noun
  • The act of inquiring; a seeking of information by asking questions; interrogation; a question or questioning. 

  • Search for truth, information, or knowledge; examination of facts or principles; research; investigation 

postoperative

adj
  • Of, relating to, or occurring in the period after a surgical operation. 

noun
  • A transgender person who has undergone gender reassignment surgery. 

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