abend vs afterword

abend

noun

  • Termination of a process prior to completion. 

  • The abnormal termination of a program. 

verb

  • To terminate abnormally. 

afterword

noun

  • an epilogue. 

  • an appendix. 

  • a postscript. 

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