cachou vs catechu

cachou

noun
  • A sweet eaten to sweeten the breath. 

  • A small metallic ball used as edible decoration on cakes etc. 

catechu

noun
  • A gummy extract of any of several species of Acacieae, produced by boiling the wood of the tree in water and evaporating the resulting liquid. 

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