Pyrrhula pyrrhula vs bullfinch

Pyrrhula pyrrhula

bullfinch

noun

  • Any of various other Old World finches in the genus Pyrrhula. 

  • The Eurasian bullfinch (Pyrrhula pyrrhula). 

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