belt-tightening vs thriftiness

belt-tightening

noun

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

adj

  • Causing or involving a reduction in expenditure. 

thriftiness

noun

  • The property of being thrifty. 

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