golden syrup vs long sweetening

golden syrup

noun
  • A pale amber-coloured treacle produced as part of the process of refining cane sugar, used in cooking and as a spread. 

long sweetening

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

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