divulge vs kiss and tell

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. 

kiss and tell

verb
  • To betray a confidence by disclosing private information, especially of a sexual nature. 

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