telephone vs voicemail

telephone

noun
  • A telecommunication device (originally mechanical, and now electronic) used for two-way talking with another person (now often shortened to phone). 

  • The game of Chinese whispers. 

  • Chinese whispers; a situation in which an initial message has been distorted and misunderstood by being passed from person to person. 

verb
  • To convey (a message) via telephone. 

  • To (attempt to) contact someone using a telephone. 

voicemail

noun
  • A computerized interactive system for storing, processing and reproducing verbal messages left through a conventional telephone network. 

  • An individual message on such a system. 

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