fetter vs manacle

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. 

manacle

verb
  • To confine with manacles. 

noun
  • A fetter, a restriction. 

  • A shackle for the wrist, usually consisting of a pair of joined rings; a handcuff; (by extension) a similar device put around an ankle to restrict free movement. 

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