beginner vs past master

beginner

noun
  • Someone who is just starting at something, or has only recently started. 

  • Someone who sets something in motion. 

  • An actor who is present on stage in the first moments of a play. 

past master

noun
  • One who has an extremely high level of ability or knowledge within an area of achievement or expertise. 

  • Someone who has previously been a master at a given lodge. 

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