deluge vs overtask

deluge

verb
  • To overwhelm. 

  • To flood with water. 

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. 

overtask

verb
  • To task too heavily; to give someone or something too many tasks; to overburden. 

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