instauration vs recoupment

instauration

noun
  • restoration after decay or dilapidation; renewal; repair 

recoupment

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

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

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