abend vs shut off

abend

verb

  • To terminate abnormally. 

noun

  • The abnormal termination of a program. 

  • Termination of a process prior to completion. 

shut off

verb

  • To stop or turn off. 

  • To separate; to isolate. 

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