inflood vs runnel

inflood

verb
  • To flood or flow in; to inflow. 

  • Of a river, water, etc.: to flood or flow into (a place). 

noun
  • The act or process of flooding or flowing in; an inflow or influx. 

runnel

verb
  • To create channels for directing the flow of liquid. 

noun
  • A small stream, a rivulet. 

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