belt-tightening vs undoing

belt-tightening

noun
  • A reduction in expenditure, often as a result of financial restrictions. 

adj
  • Causing or involving a reduction in expenditure. 

undoing

noun
  • The act of loosening or unfastening 

  • Annulment; reversal 

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

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