petty cash vs specie

petty cash

noun
  • Cash available for trivial purchases, especially limited funds for employees to use without close supervision. 

specie

noun
  • Money, especially in the form of coins made from precious metal, that has an intrinsic value; coinage. 

  • Type or kind, in various uses of the phrase in specie. 

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