cumulate vs multiply

cumulate

verb
  • To be accumulated. 

  • To accumulate; to amass. 

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

adj
  • accumulated, agglomerated, amassed 

multiply

verb
  • To grow in number. 

  • To perform multiplication. 

  • To be a factor in a multiplication with (another factor). 

  • To breed or propagate. 

  • To increase the amount, degree or number of (something). 

  • To perform multiplication on (a number). 

noun
  • An act or instance of multiplying. 

adv
  • In many or multiple ways. 

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