belt-tightening vs sparing

belt-tightening

adj
  • Causing or involving a reduction in expenditure. 

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

sparing

adj
  • Prudent and restrained in the use of resources; careful, economical or frugal. 

noun
  • The act by which something or someone is spared. 

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