killing vs strenuous

killing

adj
  • That makes one ‘die’ with laughter; very funny. 

  • That literally deprives of life; lethal, deadly, fatal. 

noun
  • A large amount of money. 

  • An instance of someone being killed. 

strenuous

adj
  • Requiring great exertion; very laborious 

  • Having great vigour or energy; forceful. 

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