stubble vs tomentum

stubble

noun
  • Short, coarse hair, especially on a man’s face. 

  • The short stalks left in a field after crops have been harvested. 

verb
  • To produce a crop in a field of stubble that remains after a preceding crop is removed, either by sowing a second crop or by allowing shoots to sprout from the roots of the stubble. 

tomentum

noun
  • A covering of fine, soft hairs; a pubescence. 

  • A mass of filamentous hairs on the leaf of a plant. 

  • A network of fine blood vessels between the pia mater and the cerebral cortex. 

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