belt-tightening vs truncation

belt-tightening

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

adj
  • Causing or involving a reduction in expenditure. 

truncation

noun
  • The removal of the least significant digits from a decimal number. 

  • The act of truncating or shortening (for example, words are shortened to form blend words or portmanteaus). 

  • The replacement of a solid angle by a plane, or a similar operation in other dimensions. 

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