abend vs calamity

abend

noun
  • The abnormal termination of a program. 

  • Termination of a process prior to completion. 

verb
  • To terminate abnormally. 

calamity

noun
  • An event resulting in great loss. 

  • The distress that results from some disaster. 

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