manioc vs tapioca

manioc

noun
  • The tropical plant Manihot esculenta, from which cassava and tapioca are prepared. 

  • Cassava root, eaten as a food. 

  • A food starch prepared from the root. 

tapioca

noun
  • The cassava plant, Manihot esculenta, from which tapioca is derived; manioc. 

  • A starchy food made from the cassava plant, used in puddings. 

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