alluvion vs deluge

alluvion

noun
  • The increase in the area of land due to the deposition of sediment (alluvium) by a river. 

deluge

noun
  • A great flood or rain. 

  • An overwhelming amount of something; anything that overwhelms or causes great destruction. 

  • A system for flooding or drenching a space, container, or area with water in an emergency to prevent or extinguish a fire. 

verb
  • To flood with water. 

  • To overwhelm. 

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