nonexempt vs off the hook

nonexempt

adj
  • Subject to taxation; not within any category of income to which taxes are not applied. 

  • Not exempt. 

noun
  • One who is not exempt. 

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 nonexempt and off the hook occurred in a corpus of books? (source: Google Ngram Viewer )