jaggery vs molasses

jaggery

noun
  • A traditional dark-brown unrefined sugar made from palm tree sap which is used throughout South and Southeast Asia; (by extension) other types of unrefined sugar. 

  • A small-scale production plant that processes sugar cane to make sugar. 

molasses

noun
  • Any similarly thick and sweet syrup produced by boiling down fruit juices, tree saps, etc., especially concentrated maple syrup. 

  • A thick, sweet syrup drained from sugarcane, especially (Canada, US) the still thicker and sweeter syrup produced by boiling down raw molasses. 

  • Anything considered figuratively sweet, especially sweet words. 

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