announce vs publish

announce

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

  • to pronounce; to declare by judicial sentence 

publish

verb
  • To announce to the public. 

  • To issue the work of (an author). 

  • To be made available in a printed publication or other medium. 

  • To have one's work accepted for a publication. 

  • To issue (something, such as printed work) for distribution and/or sale. 

  • To disseminate (a message) publicly via a newsgroup, forum, blog, etc. 

  • To issue a medium (e.g. publication). 

  • To make (information such as an event) available to components that wish to be notified (subscribers). 

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