long sweetening vs sorghum molasses

long sweetening

noun
  • A viscous, syrupy sweetener, generally molasses, but sometimes table syrup. 

sorghum molasses

noun
  • A syrup made from varieties of sorghum grass with a high sugar content, particularly in the Southern United States. 

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