rendering vs surgical procedure

rendering

noun
  • The act or process by which something is rendered. 

  • Version; translation. 

  • Sketch, illustration, or painting. 

  • The process of producing an image from an internal model, or the image thus produced. 

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 rendering and surgical procedure occurred in a corpus of books? (source: Google Ngram Viewer )