strip off vs unclothe

strip off

verb
  • To remove all of one's clothes (or sometimes to remove all except underclothes, or figuratively). 

  • To be removed by stripping 

  • To remove anything by stripping, e.g. items of clothing or paint from the side of a ship. 

unclothe

verb
  • To strip of clothes or covering; to make naked. 

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