calamity vs downer

calamity

noun
  • The distress that results from some disaster. 

  • An event resulting in great loss. 

downer

noun
  • Something or someone disagreeable, dispiriting or depressing; a killjoy. 

  • A livestock animal that has collapsed. 

  • A negative drug trip. 

  • A form of industrial action in which workers down tools and refuse to work. 

  • A drug that has depressant qualities. 

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