new cocoyam vs yautia

new cocoyam

noun
  • The cocoyam Xanthosoma sagittifolium (or other Xanthosoma), so called to distinguish it from old cocoyam. 

yautia

noun
  • An edible plant commonly found in the Caribbean: Xanthosoma sagittifolium, new cocoyam. 

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