belt-tightening vs retrenchment

belt-tightening

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

adj
  • Causing or involving a reduction in expenditure. 

retrenchment

noun
  • An act of reducing expenses; economizing. 

  • A curtailment or reduction. 

  • An act of terminating the employment of a worker or making an employee redundant, often to reduce expenses; a layoff. 

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