dipstick vs spider monkey

dipstick

noun
  • A penis. 

  • A useless person of inferior intellect; a dipshit. 

  • A stick or rod used to measure the depth of a liquid. Often used to check the level at which a liquid in an opaque or inaccessible tank or reservoir stands; gauge. 

verb
  • To check (a person) for their understanding of something, as of a lesson, or attitude toward something. 

  • To measure the level of a fluid using a dipstick. 

spider monkey

noun
  • Any New World monkey of the genus Ateles, with long, spindly limbs. 

  • A muriqui, New World monkey of the genus Brachyteles, closely related to Ateles. 

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