amateur vs satisfactory

amateur

noun
  • Someone who is unqualified or insufficiently skillful. 

  • 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. 

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

  • Non-professional. 

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

satisfactory

noun
  • Somebody or something that meets requirements without exceeding them. 

  • The rating given to somebody or something that meets requirements without exceeding them. 

adj
  • Causing satisfaction; agreeable or pleasant; satisfying. 

  • Done to satisfaction; adequate or sufficient. 

  • Making atonement for a sin; expiatory. 

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