celery vs emerald green

celery

noun
  • A yellow-green colour, like that of a celery. 

  • A European herb (Apium graveolens) of the carrot family. 

  • The stalks of this herb eaten as a vegetable. 

emerald green

noun
  • A rich green colour, like that of an emerald. 

  • A durable vivid green pigment made from copper arsenate. 

adj
  • Of a rich green colour, like that of an emerald. 

How often have the words celery and emerald green occurred in a corpus of books? (source: Google Ngram Viewer )