boildown vs distillation

boildown

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

distillation

noun
  • The substance extracted by distilling. 

  • That which falls in drops. 

  • Purification through repeated or continuous distilling; rectification. 

  • Separation into specific hydrocarbon groups; fractionation. 

  • The act of falling in drops, or the act of pouring out in drops. 

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