lump vs yolk

lump

noun
  • A kind of fish, the lumpsucker. 

  • A swelling or nodule of tissue under the skin or in an internal part of the body. 

  • A small, shaped mass of sugar, typically about a teaspoonful. 

  • A dull or lazy person. 

  • A beating or verbal abuse. 

  • A group, set, or unit. 

  • A projection beneath the breech end of a gun barrel. 

  • Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape. 

verb
  • To treat as a single unit; to group together in a casual or chaotic manner (as if forming an ill-defined lump of the items). 

  • To bear (a heavy or awkward burden); to carry (something unwieldy) from one place to another. 

  • To hit or strike (a person). 

  • To burden (someone) with an undesired task or responsibility. 

  • To form a lump or lumps. 

yolk

noun
  • The grease in a sheep's fleece; lanolin. 

  • The yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young. 

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