cobber vs yaar

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. 

yaar

noun
  • A friend, pal, or buddy. 

  • lover 

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