postoperative vs postsurgical

postoperative

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

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

postsurgical

adj
  • Relating to the period following surgery. 

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