Internet vs Intertubes

Internet

name
  • The specific internet consisting of a global network of computers that communicate using Internet Protocol (IP) and that use Border Gateway Protocol (BGP) to identify the best paths to route those communications. 

noun
  • specific internet consisting of a global network of computers 

Intertubes

name
  • The Internet. 

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