inrush vs landflood

inrush

noun
  • A crowding or flooding in. 

  • The initial flow of electricity into a component when it is switched on. 

landflood

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

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