fettered vs liable

fettered

adj
  • Restricted. 

  • Of the feet: bent backward and apparently unfit for walking. 

  • Bound by chains or shackles. 

liable

adj
  • subject; susceptible. 

  • exposed to a certain contingency or causality, more or less probable. 

  • bound or obliged in law or equity; responsible; answerable. 

  • likely. 

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