circumcision vs surgical procedure

circumcision

noun
  • The surgical removal of the foreskin of the penis. 

  • The surgical removal of the clitoral hood of the clitoris; female circumcision. 

  • The surgical removal of the clitoris; clitoridectomy, usually referred to as female genital mutilation. 

surgical procedure

noun
  • A procedure in which one or more incisions are made into the body in order to repair damage or remove diseased tissue; an operation. 

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