black raspberry vs blackcap

black raspberry

noun
  • A plant belonging to either of two closely related species, Rubus leucodermis or Rubus occidentalis, both native to North America. 

  • The fruit of any of these species. 

  • Rubus coreanus, native to Korea, Japan, and China 

blackcap

noun
  • Whitebark raspberry (Rubus leucodermis). 

  • A small Old World warbler, Eurasian blackcap (Sylvia atricapilla), which is mainly grey with a black crown. 

  • An apple roasted until black, to be served in a dish of boiled custard. 

How often have the words black raspberry and blackcap occurred in a corpus of books? (source: Google Ngram Viewer )