commentary vs editorial

commentary

noun
  • An oral relation of an event, especially broadcast by television or radio, as it occurs. 

  • A series of comments or annotations; especially, a book of explanations or expositions on the whole or a part of some other work. 

  • A brief account of transactions or events written hastily, as if for a memorandum. 

editorial

noun
  • A similar commentary on radio or television. 

  • An article in a publication giving the opinion of its editors on a given topic or current event. 

adj
  • Appropriate for high fashion magazines. 

  • Of or relating to an editor, editing or an editorial. 

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