fess vs tell all

fess

verb
  • To confess; to admit. 

noun
  • A horizontal band across the middle of the shield. 

adj
  • Of animals, bad-tempered, fierce. 

  • Lively; active; strong. 

  • Proud; conceited. 

tell all

verb
  • Used other than figuratively or idiomatically: see tell, all. 

  • To reveal everything, particularly information that is normally withheld. 

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