brown sugar vs lactose

brown sugar

noun
  • Refined sugar to which molasses has been added. 

  • An attractive black woman. 

  • Heroin. 

  • Sugar which has been only partially refined and still contains molasses. 

lactose

noun
  • The disaccharide sugar of milk and dairy products, C₁₂H₂₂O₁₁, a product of glucose and galactose used as a food and in medicinal compounds. 

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