figwort vs lesser celandine

figwort

noun
  • Any of various woodland herbs and shrubs of the genus Scrophularia. 

lesser celandine

noun
  • A European perennial herb, Ficaria verna, having heart-shaped leaves and solitary yellow flowers 

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