celery vs parsley

celery

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

  • The stalks of this herb eaten as a vegetable. 

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

parsley

noun
  • A bright green, biennial herb, Petroselinum crispum, having many cultivars. 

  • The leaves of this plant used in Middle Eastern, European, and American cooking. 

verb
  • to add parsley to 

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