allayment vs retrenchment

allayment

noun
  • Something that allays; mitigation 

retrenchment

noun
  • A curtailment or reduction. 

  • An act of reducing expenses; economizing. 

  • 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 allayment and retrenchment occurred in a corpus of books? (source: Google Ngram Viewer )