World Wide Web vs virtual reality

World Wide Web

name
  • Usually preceded by the: collectively, all of the hypertext documents (web pages) on the Internet stored in different computers around the world that hyperlink to each other and to other kinds of media, and are typically retrieved by the Hypertext Transfer Protocol (HTTP) and Hypertext Transfer Protocol Secure (HTTPS). 

virtual reality

noun
  • A computer technology that simulates a real or imagined environment so that the user can interact with it as if physically present. 

How often have the words World Wide Web and virtual reality occurred in a corpus of books? (source: Google Ngram Viewer )