broken-down vs nonoperational

broken-down

adj
  • Which has broken down and, as a result, is no longer in working order. 

  • Not properly maintained; neglected. 

  • Ruined in character or strength. 

nonoperational

adj
  • Not operating; not working. 

  • Not associated with operation. 

How often have the words broken-down and nonoperational occurred in a corpus of books? (source: Google Ngram Viewer )