cumulate vs rack up

cumulate

verb
  • To be accumulated. 

  • To accumulate; to amass. 

adj
  • accumulated, agglomerated, amassed 

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

rack up

verb
  • to acquire, to gather together. 

  • to arrange in a rack 

  • to gain (points etc.; in a game or sport), to accumulate 

  • to defeat severely, to thrash 

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