boetie vs butty

boetie

noun
  • man, fellow 

  • brother 

butty

noun
  • Friend. 

  • A miner who works under contract, receiving a fixed amount per ton of coal or ore. 

  • A sandwich, usually with a hot savoury filling in a breadcake. The most common are chips, bacon, sausage and egg. 

  • A workmate. 

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