commence vs incept

commence

verb
  • To begin, start. 

  • To begin to be, or to act as. 

incept

verb
  • To begin. 

  • To take in or ingest. 

  • To put an idea into a person's mind so deeply that they believe it was their own. Inspired by the movie Inception (2010) and used by Mark Zuckerberg & Yuval Noah Harari in Conversation at 01:23:00. 

  • To be accepted to the Master of Arts degree at Oxford or Cambridge University. 

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