Impatiens capensis vs celandine

Impatiens capensis

celandine

noun
  • lesser celandine (Ficaria verna, formerly Ranunculus ficaria) 

  • Either of two not closely related flowering plants 

  • greater celandine (Chelidonium majus) 

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