simian vs spider monkey

simian

noun
  • An ape or monkey, especially an anthropoid. 

adj
  • Bearing resemblance to an ape. 

  • Of or pertaining to apes; apelike. 

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 simian and spider monkey occurred in a corpus of books? (source: Google Ngram Viewer )