immixture vs olio

immixture

noun
  • The act, or the result of immixing 

olio

noun
  • A collection of various musical, theatrical or other artistic works; a miscellany. 

  • A rich, thick, Spanish stew consisting of meat and vegetables. 

  • A medley or mixture; a hotchpotch. 

  • Vaudeville or similar miscellaneous musical or theatrical entertainment skits presented between the main acts of burlesque or minstrel shows. 

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