maltose vs saccharose

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 

saccharose

noun
  • sugar, especially sucrose 

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