newscaster vs subeditor

newscaster

noun
  • One who delivers the news for broadcast on television, radio, etc; a newsreader. 

subeditor

noun
  • An assistant editor, usually in a specific department of a newspaper. 

  • A copy editor at a newspaper or magazine. 

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