cobber vs pardner

cobber

noun
  • A pal, buddy, mate, friend; often used in direct address by one male to another. 

  • A sweet consisting of a small block of hard caramel covered in chocolate. 

pardner

noun
  • A friend or companion. 

  • A local community banking co-op, often set up as an initiative for a social group unable to get formal credit or bank accounts, notably West Indians in Britain. 

  • A partner. 

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