overturn vs perpetuate

overturn

verb
  • To turn over, capsize or upset. 

  • To diminish the significance of a previous defeat by winning; to make a comeback from. 

  • To overthrow or destroy. 

  • Of a body of water: to undergo a limnic eruption, where dissolved gas suddenly erupts from the depths. 

  • To reverse (a decision); to overrule or rescind. 

noun
  • The overturning or overthrow of some institution or state of affairs; ruin. 

  • A turning over or upside-down; inversion. 

perpetuate

verb
  • To make (something) perpetual; to make (something) continue for an indefinite time; also, to preserve (something) from extinction or oblivion. 

  • To prolong the existence of (something) by repetition; to reinforce. 

  • To record (the testimony of a witness) which may be lost before a matter comes to trial. 

adj
  • Perpetual, or made perpetual; continued for an indefinite time. 

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