peruke vs syrup of figs

peruke

noun
  • A wig, especially one with long hair on the sides and back, worn mainly by men in the 17th and 18th centuries. 

syrup of figs

noun
  • A wig. 

  • A type of laxative made from figs. 

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