abend vs conclude

abend

verb
  • To terminate abnormally. 

noun
  • The abnormal termination of a program. 

  • Termination of a process prior to completion. 

conclude

verb
  • To shut off; to restrain; to limit; to estop; to bar; generally in the passive. 

  • To come to a conclusion, to a final decision. 

  • To end; to come to an end. 

  • to deduce, to infer (develop a causal relation) 

  • To bring to an end; to close; to finish. 

  • To bring about as a result; to effect; to make. 

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