ruddock vs rufous-tailed scrub robin

ruddock

noun
  • The European robin. 

  • A variety of red apple. 

rufous-tailed scrub robin

noun
  • Cercotrichas galactotes, a species of bird. Also called rufous scrub robin, rufous bush robin, rufous warbler, rufous bush chat 

How often have the words ruddock and rufous-tailed scrub robin occurred in a corpus of books? (source: Google Ngram Viewer )