aper vs simian

aper

noun
  • Someone who apes something 

simian

noun
  • An ape or monkey, especially an anthropoid. 

adj
  • Bearing resemblance to an ape. 

  • Of or pertaining to apes; apelike. 

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