own up vs unveil

own up

verb
  • to acknowledge, confess, or admit guilt or responsibility. Often used with to. 

unveil

verb
  • To remove a veil; to reveal oneself. 

  • to show, especially for the first time 

  • To remove a veil from; to uncover; to reveal something hidden. 

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