cable television vs radiogram

cable television

noun
  • Television received through coaxial cables; specifically, a TV service that provides reception to suburbs or other residential areas through utility lines and offering a wide variety of TV channels through satellite reception. 

radiogram

noun
  • A message, like a telegram, transmitted by radio rather than wires. 

  • An entertainment device that combined a radio and a record player or gramophone. 

  • A radiograph 

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