abend vs quitting

abend

noun
  • Termination of a process prior to completion. 

  • The abnormal termination of a program. 

verb
  • To terminate abnormally. 

quitting

noun
  • The termination of employment, initiated by the employee. 

  • The deliberate ending of something. 

  • The ceasing of a habit, especially smoking cigarettes or other addictive behaviors. 

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