belt-tightening vs distillation

belt-tightening

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

adj
  • Causing or involving a reduction in expenditure. 

distillation

noun
  • That which falls in drops. 

  • The substance extracted by distilling. 

  • Purification through repeated or continuous distilling; rectification. 

  • Separation into specific hydrocarbon groups; fractionation. 

  • The act of falling in drops, or the act of pouring out in drops. 

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