Eurasian bullfinch vs common bullfinch

Eurasian bullfinch

noun

  • A small passerine bird, Pyrrhula pyrrhula, in the finch genus. 

common bullfinch

noun

  • A small bird, the Eurasian bullfinch (Pyrrhula pyrrhula). 

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