divulge vs tell tales out of school

divulge

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

  • To indicate publicly; to proclaim. 

tell tales out of school

verb
  • To reveal confidential or sensitive information; to gossip. 

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