amateur vs prosumer

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. 

prosumer

noun
  • A serious, enthusiastic consumer: not professional (earning money), but of similar interest and skills to a (generally lower level) professional, or aspiring to such. The target market of prosumer equipment. 

  • A person in postindustrial society who combines the economic roles of producer and consumer 

adj
  • Targeted at serious, enthusiastic consumers, incorporating professional features but often modified for non-professional use. 

  • high-end 

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