brook vs rill

brook

noun
  • A body of running water smaller than a river; a small stream. 

  • A water meadow. 

  • Low, marshy ground. 

verb
  • To bear; endure; support; put up with; tolerate. 

rill

noun
  • A very small brook; a streamlet; a creek, rivulet. 

verb
  • To trickle, pour, or run like a small stream. 

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