amateur vs apprentice

amateur

noun
  • A person attached to a particular pursuit, study, science, or art (such as music or painting), especially one who cultivates any study, interest, taste, or attachment without engaging in it professionally. 

  • Someone who is unqualified or insufficiently skillful. 

adj
  • Showing a lack of professionalism, experience or talent. 

  • Non-professional. 

  • Created, done, or populated by amateurs or non-professionals. 

apprentice

noun
  • One who is bound by indentures or by legal agreement to serve a tradesperson, or other person, for a certain time, with a view to learn the art, or trade, in which his master is bound to instruct him. 

  • A trainee, especially in a skilled trade. 

verb
  • To put under the care and supervision of a master, for the purpose of instruction in a trade or business. 

  • To be an apprentice to. 

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