cowlick vs feeler

cowlick

noun
  • An unruly lock or section of hair that sticks straight out from the skull or lies at an angle at odds with the rest of an individual's hair, like a whorl or vortex. 

feeler

noun
  • An antenna or appendage used for feeling, especially on an insect. 

  • Someone or something that feels. 

  • Someone that assumes or imagines that one's affection is reciprocated; Someone that indulges in one's own wishful thinking; One who flatters oneself 

  • Something ventured to test another's feelings, opinion, or position. 

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