comedown vs undoing

comedown

noun
  • A sudden drop to a lower status, condition or level; a disappointment or letdown. 

  • A calm, mellow period experienced after the initial high from taking drugs. 

undoing

noun
  • Ruin; defeat, (also) that which causes defeat or ruin. 

  • Annulment; reversal 

  • The act of loosening or unfastening 

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