block out vs unveil

block out

verb
  • to cover something, so as to make it impossible to see. 

  • to prevent from entering or penetrating. 

  • to prevent (a thought) from entering one's mind. 

  • to begin to reduce to shape; to mark out roughly; to lay out. 

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 block out and unveil occurred in a corpus of books? (source: Google Ngram Viewer )