liable vs off the hook

liable

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

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

  • subject; susceptible. 

  • likely. 

off the hook

adj
  • Of a telephone, having an open connection; not hung up. 

  • Performing extraordinarily well. 

  • Relieved of a duty, burden, responsibility, or pressure. 

  • Fresh, cool, trendy, excellent, incredible. 

  • Of a telephone, ringing frequently. 

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