olla podrida vs subspecies

olla podrida

noun
  • A miscellaneous assortment or collection; a hodgepodge. 

  • A Spanish stew made from a mixture of highly seasoned meat and vegetables. 

subspecies

noun
  • A subdivision of a species in other scientific disciplines. 

  • A taxon at that rank, often indicated with trinomial nomenclature (such as Felis silvestris silvestris in zoology and Pinus nigra subsp. salzmannii in botany). 

  • A rank in the classification of organisms, below species. 

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