break the news vs disclose

break the news

verb
  • To inform someone of something first, usually used when it will be difficult to tell the person. 

disclose

verb
  • To expose to the knowledge of others; to make known, state openly, reveal. 

  • To uncover, physically expose to view. 

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