dematerialization vs fading

dematerialization

noun
  • The act or process of dematerializing, or becoming immaterial. 

  • The substitution of paper-form securities by book-entry securities. 

fading

noun
  • The process by which something fades; gradual diminishment. 

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