bonded vs contracted

bonded

adj
  • Secured by bond. 

  • Joined securely, either with adhesive, heat process or pressure. 

contracted

adj
  • Incurred; acquired. 

  • Arranged by contract; established by agreement. 

  • Made smaller by contraction. 

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