cobber vs pal

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. 

pal

noun
  • A friend, buddy, mate, cobber; someone to hang around with. 

  • An informal term of address, often used ironically in a hostile way. 

verb
  • Be friends with, hang around with. 

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