airing vs radiocast

airing

noun
  • The broadcast of a television or radio show. 

  • A public expression of an opinion or discussion of a subject. 

  • An exposure to warm or fresh air. 

radiocast

noun
  • A radio broadcast. 

verb
  • To broadcast by radio. 

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