abend vs topple

abend

verb
  • To terminate abnormally. 

noun
  • The abnormal termination of a program. 

  • Termination of a process prior to completion. 

topple

verb
  • To overturn 

  • To overthrow something. 

  • To totter and fall, or to lean as if about to do so. 

  • To push or throw over 

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