disentangle vs unfold

disentangle

verb
  • To free something from entanglement; to extricate or unknot. 

  • To unravel; to separate into discrete components or units. 

  • To become free or untangled. 

unfold

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

  • To undo a folding. 

  • To release from a fold or pen. 

  • To turn out; to happen; to develop. 

  • To reveal. 

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

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