cassava vs yuca

cassava

noun

  • Tapioca, a starchy pulp made with manioc roots. 

  • Manioc (Manihot esculenta), a tropical plant which is the source of tapioca. 

yuca

noun

  • cassava root 

  • Cassava 

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