own up vs secrete

own up

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

secrete

verb
  • To conceal. 

  • To extract a substance from blood, sap, or similar to produce and emit waste for excretion or for the fulfilling of a physiological function. 

  • To exude or yield. 

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