unruffle vs wind down

unruffle

verb
  • To calm or soothe (a person). 

  • To calm down. 

  • To remove ruffles from; to make smooth. 

wind down

verb
  • To relax; to get rid of stress; to destress. 

  • To slow, as if coming to an end; to become calmer or less busy. 

  • To unwind. 

  • To lower by winding, as with a crank or windlass. 

  • To shut down slowly (by degrees or in phases). 

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