Erithacus rubecola vs robin

Erithacus rubecola

robin

noun
  • An American robin, Turdus migratorius. 

  • A trimming in front of a dress. 

  • A European robin, Erithacus rubecula. 

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