Malabar chestnut vs money plant

Malabar chestnut

noun
  • The edible seed of a tropical tree, Pachira aquatica, also known as the money tree. 

money plant

noun
  • Pachira aquatica, a tropical wetland tree, native to Central and South America.known by a variety of common names including 

  • A small plant with very round, dark green leaves, of the species Pilea peperomioides, native to southern China. 

  • A small, fleshy-leaved plant of the species Crassula ovata 

  • A herbaceous biennial plant of the species Lunaria annua, grown for its attractive spring flowering and dried silver seed pod middles, native 

  • A tropical vining plant of the species Epipremnum aureum, native to northern Australia and much of southern and eastern Asia. 

How often have the words Malabar chestnut and money plant occurred in a corpus of books? (source: Google Ngram Viewer )