reveal vs unfold

reveal

verb
  • To uncover; to show and display that which was hidden. 

  • To communicate that which could not be known or discovered without divine or supernatural instruction. 

noun
  • The outer side of a window or door frame. 

  • A revelation; an uncovering of what was hidden in the scene or story. 

unfold

verb
  • To reveal. 

  • To undo a folding. 

  • To release from a fold or pen. 

  • To turn out; to happen; to develop. 

  • To open (anything covered or closed); to lay open to view or contemplation; to bring out in all the details, or by successive development. 

noun
  • In functional programming, a kind of higher-order function that is the opposite of a fold. 

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