accrue vs tot up

accrue

verb
  • To increase, to rise 

  • To become an enforceable and permanent right. 

  • To accumulate. 

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

tot up

verb
  • To add up (to). 

  • To calculate the sum of a number of numbers or quantities. 

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