inflood vs landflood

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. 

landflood

noun
  • An overflowing of land by river; an inundation or freshet. 

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