sixpenny vs threepenny

sixpenny

noun
  • A stamp worth sixpence. 

  • A publication costing sixpence. 

adj
  • Worth six pennies. 

threepenny

noun
  • A stamp worth three pence. 

adj
  • Of little worth; mean; vulgar. 

  • Having a value or cost of threepence. 

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