short hairs vs vellus hair

short hairs

noun
  • Pubic hair. 

vellus hair

noun
  • An individual strand of vellus hair 

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

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