Internet vs airmail

Internet

noun
  • specific internet consisting of a global network of computers 

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. 

airmail

noun
  • The items of mail so carried. 

  • The system of conveying mail using aircraft. 

verb
  • To send mail by air. 

  • To (unintentionally) throw the ball well over a fielder's head where that fielder is unable to make a play on the ball. 

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