malachite vs money plant

malachite

noun
  • A mild green colour, like that of the mineral. 

  • A bright green mineral, a basic copper carbonate, Cu₂CO₃(OH)₂; one of the principal ores of copper. 

adj
  • Of a colour ranging from olive-taupe to a mild to deeply-rich (at times seemingly translucent) green, like that of the mineral which is present on oxidized copper. 

money plant

noun
  • 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 

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

  • 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 malachite and money plant occurred in a corpus of books? (source: Google Ngram Viewer )