plum vs yolk

plum

noun
  • Prunus rivularis (creek plum or hog plum) 

  • A stone-fruit tree which bears this fruit, Prunus domestica. 

  • Prunus americana (American plum) 

  • Prunus sect. Armeniaca (better known as apricots) 

  • A desirable or choice thing of its kind; a prize selection; a choice appointment, assignment etc. 

  • A fool, an idiot. 

  • Prunus mume, an Asian fruit more closely related to the apricot than the plum, usually consumed pickled, dried, or as a juice or wine; ume. 

  • A dark bluish-red color/colour, the colour of some plums. 

  • An edible, fleshy stone fruit of Prunus domestica (European plum), often of a dark red or purple colour. 

  • Prunus ursina (bear's plum) 

  • Prunus angustifolia (Chickasaw plum or sand plum) 

  • Prunus hortulana (hortulan plum) 

  • Prunus nigra (Canadian plum or black plum) 

  • Prunus spinosa (sloe) 

  • Prunus subcordata (Klamath plum or Oregon plum) 

  • Prunus salicina (Chinese plum or Japanese plum) 

  • Prunus cerasifera (cherry plum or myrobalan) 

  • A testicle. 

adv
  • Completely; utterly. 

adj
  • Of a dark bluish-red colour. 

  • Choice; especially lavish or preferred. 

  • Plumb 

verb
  • To plumb. 

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 plum and yolk occurred in a corpus of books? (source: Google Ngram Viewer )