announce vs divulge

announce

verb
  • to give public notice, especially for the first time; to make known 

  • to pronounce; to declare by judicial sentence 

divulge

verb
  • To indicate publicly; to proclaim. 

  • To make public or known; to communicate to the public; to tell (information, especially a secret) so that it may become generally known. 

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