approve vs undo

approve

verb
  • To make profit of; to convert to one's own profit — said especially of waste or common land appropriated by the lord of the manor. 

  • To officially sanction; to ratify; to confirm; to set as satisfactory. 

  • To consider worthy (to); to be pleased (with); to accept. 

  • To regard as good; to commend; to be pleased with; to think well of. 

undo

verb
  • To impoverish or ruin, as in reputation; to cause the downfall of. 

  • To reverse the effects of an action. 

  • To unfasten. 

noun
  • An operation that reverses a previous action. 

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