abend vs expiry

abend

noun
  • Termination of a process prior to completion. 

  • The abnormal termination of a program. 

verb
  • To terminate abnormally. 

expiry

noun
  • End; termination; expiration. 

  • Synonym of expiration date 

  • Death. 

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