cumulate vs stash (away)

cumulate

adj
  • accumulated, agglomerated, amassed 

verb
  • To accumulate; to amass. 

  • To be accumulated. 

noun
  • An igneous rock formed by the accumulation of crystals from a magma either by settling or floating. 

stash (away)

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