stubble vs vellus hair

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. 

vellus hair

noun
  • Short, fine, light-colored, and barely noticeable hair that develops on most of a person's body from his/her childhood. 

  • An individual strand of vellus hair 

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