Eunectes murinus vs anaconda

Eunectes murinus

anaconda

name
  • A particular variety of stud poker. 

noun
  • A large penis. 

  • The green anaconda; Eunectes murinus. 

  • Any of various large nonvenomous snakes of the genus Eunectes, found mainly in northern South America. 

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