sixpence vs sultana

sixpence

noun
  • A former British coin worth sixpence, first minted in 1551. 

sultana

noun
  • An old form of necklace. 

  • A female ruler of a sultanate. 

  • A pale yellow raisin made from a seedless grape. 

  • A type of viol, a cither viol. 

  • A wife or mistress of a sultan. 

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