straighten vs topple

straighten

verb
  • To bribe or corrupt. 

  • To clarify a situation or concept to (an audience). 

  • To stand up, especially from a sitting position. 

  • To cause to become straight. 

  • To become straight. 

  • To put in order; to sort; to tidy up. 

topple

verb
  • To overthrow something. 

  • To overturn 

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

  • To push or throw over 

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