marrow squash vs medulla

marrow squash

noun

  • The marrow (vegetable). 

medulla

noun

  • The inner substance of various organs and structures, especially the marrow of bones. 

  • The medulla oblongata. 

  • The soft inner part of something, especially the pith of a fruit. 

  • The internal tissue of a plant. 

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