marrow vs nubbin

marrow

noun
  • A kind of vegetable like a large courgette/zucchini or squash. 

  • The inner meaning or purpose. 

  • The pith of certain plants. 

  • Bone marrow biopsy. 

  • The essence; the best part. 

  • The substance inside bones which produces blood cells. 

  • A friend, pal, buddy, mate. 

nubbin

noun
  • A stub, especially a stub of undeveloped corn or fruit or nipple. 

  • A small protuberance, bud, bump, or knob. 

  • The clitoris. 

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