maltose vs monosaccharide

maltose

noun
  • A disaccharide, C₁₂H₂₂O₁₁ formed from the digestion of starch by amylase; is converted to glucose by maltase; it is an isomer of trehalose 

monosaccharide

noun
  • A simple sugar such as glucose, fructose or deoxyribose that has a single ring 

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