bad news vs calamity

bad news

noun
  • News of unpleasant, unfortunate or sad events. 

  • An irritating, troublesome or harmful person, situation or thing. 

calamity

noun
  • The distress that results from some disaster. 

  • An event resulting in great loss. 

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