bonnie vs bonny

bonnie

adj
  • Merry; happy. 

  • Beautiful; pretty; attractive; handsome. 

  • Fine, good (often used ironically). 

bonny

noun
  • A round and compact bed of ore, or a distinct bed, not communicating with a vein. 

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