enzyme vs leavening

enzyme

noun
  • leavened bread, as opposed to azyme 

  • A globular protein that catalyses a biological chemical reaction. 

leavening

noun
  • The process by which something is leavened. 

  • Synonym of leavening agent 

adj
  • Making light by aeration. 

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