accrue vs accumulate

accrue

verb
  • To reach or come to by way of increase; to arise or spring up because of growth or result, especially as the produce of money lent. 

  • To become an enforceable and permanent right. 

  • To increase, to rise 

  • To accumulate. 

  • To be incurred as a result of the passage of time. 

accumulate

verb
  • To gradually grow or increase in quantity or number. 

  • To heap up in a mass; to pile up; to collect or bring together (either literally or figuratively) 

adj
  • Collected; accumulated. 

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