lactose vs malt

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. 

malt

noun
  • A milkshake with malted milk powder added for flavor. 

  • Malt liquor, especially malt whisky. 

  • Malted grain (sprouted grain) (usually barley), used in brewing and otherwise. 

  • Maltose-rich sugar derived from malted grain. 

verb
  • To convert a cereal grain into malt by causing it to sprout (by soaking in water) and then halting germination (by drying with hot air) in order to develop enzymes that can break down starches and proteins in the grain. 

  • To become malt. 

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