detach vs piecen

detach

verb
  • To take apart from; to take off. 

  • To separate for a special object or use. 

  • To come off something. 

piecen

verb
  • To extend by adding a part or parts. 

  • To join broken threads or ends in spinning. 

  • To join; piece (together); fay. 

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