laxation vs undoing

laxation

noun
  • The act of loosening or slackening, or the state of being loosened or slackened. 

  • Defecation. 

undoing

noun
  • The act of loosening or unfastening 

  • Annulment; reversal 

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

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