infiltration vs inflood

infiltration

noun
  • The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body. 

  • The substance which has entered the pores or cavities of a body. 

  • The act of secretly entering a physical location and/or organization. 

  • process by which water on the ground surface enters the soil. 

inflood

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

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

  • To flood or flow in; to inflow. 

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