boildown vs compendium

boildown

noun
  • The process of boiling something down; concentration by means of evaporation. 

compendium

noun
  • A collection of board games packaged in a single box. 

  • A short, complete summary; an abstract. 

  • A collected body of information on the standards of strength, purity, and quality of drugs. 

  • A list or collection of various items. 

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