off the hook vs unconnected

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. 

unconnected

adj
  • Not connected or joined. 

  • Confused or disconnected. 

  • Without connections of family, etc. 

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