butterscotch vs dulce de leche

butterscotch

noun
  • A hard candy made from butter, brown sugar, syrup and vanilla. 

  • A light brown colour, like that of butterscotch candy. 

  • A sauce or syrup made of similar ingredients. 

adj
  • Of a light brown colour, like that of butterscotch candy. 

  • Having the flavour of butterscotch. 

dulce de leche

noun
  • A South American sweet spread made from sugar and boiled milk. 

How often have the words butterscotch and dulce de leche occurred in a corpus of books? (source: Google Ngram Viewer )