kindle vs regroup

kindle

verb
  • To begin to grow or take hold. 

  • To arouse or inspire (a passion, etc). 

  • To start (a fire) or light (a torch, a match, coals, etc.). 

  • To bring forth young; to give birth. 

noun
  • A group of kittens. 

adj
  • pregnant 

regroup

verb
  • To pause and get organized again. 

  • To group or categorize again. 

noun
  • An act of regrouping. 

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