abend vs sunset

abend

noun
  • Termination of a process prior to completion. 

  • The abnormal termination of a program. 

verb
  • To terminate abnormally. 

sunset

noun
  • A set termination date. 

  • The moment each evening when the sun disappears below the western horizon. 

  • The final period of the life of a person or thing. 

  • The changes in color of the sky before and after sunset. 

  • The region where the sun sets; the west. 

verb
  • To phase out. 

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