fess vs front up

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. 

front up

verb
  • To admit or confess. 

  • To show up; to appear or present oneself. 

  • To lead or represent. 

  • To meet with one's best efforts. 

  • To face; to confront or challenge. 

  • To pay in advance or give with the expectation of being reimbursed later. 

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