galactose vs sucrose

galactose

noun
  • A monosaccharide found, along with lactose, in dairy products, and is synthesized by the body where it is found associated with glycolipids and glycoproteins. 

sucrose

noun
  • A disaccharide with formula C₁₂H₂₂O₁₁, consisting of two simple sugars, glucose and fructose; normal culinary sugar. 

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