début vs unveil

début

verb
  • To make one's début. 

noun
  • A person’s or thing’s first appearance before society or another audience; one’s “maiden voyage”. 

unveil

verb
  • to show, especially for the first time 

  • To remove a veil; to reveal oneself. 

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

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