Xanthosoma atrovirens vs spoonflower

Xanthosoma atrovirens

spoonflower

noun
  • A plant, the yautia (Xanthosoma sagittifolium). 

  • A plant, white arrow arum (Peltandra sagittifolia) 

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