clarified butter vs margarine

clarified butter

noun
  • A cooking fat made by gently heating butter and separating the solids from the butterfat. 

margarine

noun
  • A spread, manufactured from a blend of vegetable oils (some of which are hydrogenated), emulsifiers etc, mostly used as a substitute for butter. 

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