non-paper vs white paper

non-paper

adj
  • Used of information that is stored electronically 

  • Not made of paper 

noun
  • A discussion paper which is not to form part of formal business, especially in the UN. 

white paper

noun
  • A document published by the European Commission that contains proposals for European Union action in a specific area. 

  • A parliamentary document announcing government policy. 

  • A factual write-up of something, specifically devoid of the appearance of marketing. 

  • Used other than figuratively or idiomatically: see white, paper. 

How often have the words non-paper and white paper occurred in a corpus of books? (source: Google Ngram Viewer )