recoupment vs recuperation

recoupment

noun
  • A recovery of what had been lost; reimbursement. 

  • A reduction of the plaintiff's damages by keeping out a part. 

recuperation

noun
  • Instance of getting something back. 

  • Gradual restoration to health. 

  • Process by which radical or subversive ideas are co-opted by mainstream society. 

How often have the words recoupment and recuperation occurred in a corpus of books? (source: Google Ngram Viewer )