extrication vs unbinding

extrication

noun
  • The act or process of extricating or disentangling; a freeing from perplexities; disentanglement. 

  • Rescue of a trapped person in vehicle or machinery 

  • The act of sending out or evolving. 

unbinding

noun
  • The release or freeing of something that was bound. 

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