enfetter vs fetter

enfetter

verb
  • To bind in fetters; to enchain. 

fetter

verb
  • To shackle or bind up with fetters. 

  • To restrain or impede; to hamper. 

noun
  • A chain or similar object used to bind a person or animal – often by its legs (usually in plural). 

  • Anything that restricts or restrains. 

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