incarcerate vs unbind

incarcerate

verb
  • To confine; to shut up or enclose; to hem in. 

  • To lock away; to imprison, especially for breaking the law. 

unbind

verb
  • To take bindings off. 

  • To set free from a debt, contract or promise. 

  • To disable some kind of connection in software, such as a key binding. 

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