jelly coconut vs water coconut

jelly coconut

noun
  • A coconut with soft or gelatinous meat inside as well as the meat itself (which is of regular quality if the coconut is immature) 

water coconut

noun
  • Synonym of jelly coconut 

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