podcast vs simulcast

podcast

verb
  • To deliver (information) in the form of a programme, especially an audio programme, over the Internet on a regular basis for playback on computers or portable devices such as mobile phones. 

  • To deliver a programme, especially an audio programme, over the Internet on a regular basis for playback on computers or portable devices such as mobile phones. 

noun
  • A programme, especially an audio programme, produced on a regular basis, delivered over the Internet in a compressed digital format and designed for playback on computers or portable devices such as mobile phones. 

  • An individual episode of such a programme. 

simulcast

verb
  • To broadcast a program or event across more than one medium or service at the same time. 

noun
  • A program or event that is broadcast across more than one medium or service at the same time. 

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