cosigner vs holder

cosigner

noun
  • A person who accepts joint responsibility for the debt of another 

  • A cosignatory 

holder

noun
  • A person who temporarily or permanently possesses something. 

  • A thing that holds. 

  • The defending champion. 

  • One who is employed in the hold of a vessel. 

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