beck vs rill

beck

noun
  • A stream or small river. 

  • A vat. 

  • A significant nod, or motion of the head or hand, especially as a call or command. 

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 beck and rill occurred in a corpus of books? (source: Google Ngram Viewer )