believe vs front up

believe

verb
  • To accept that someone is telling the truth. 

  • To have religious faith; to believe in a greater truth. 

  • To accept as true, particularly without absolute certainty (i.e., as opposed to knowing). 

  • To opine, think, reckon. 

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 believe and front up occurred in a corpus of books? (source: Google Ngram Viewer )