collection vs stockpile

collection

noun
  • A set of items or amount of material procured or gathered together. 

  • A set of college exams generally taken at the start of the term. 

  • A set of sets; used because such a thing is in general too large to comply with the formal definition of a set. 

  • The jurisdiction of a collector of excise. 

  • The activity of collecting. 

  • Multiple related objects associated as a group. 

  • The quality of being collected; calm composure. 

  • A gathering of money for charitable or other purposes, as by passing a contribution box for donations. 

  • Debt collection. 

stockpile

noun
  • A supply (especially a large one) of something kept for future use, specifically in case the cost of the item increases or if there a shortage. 

  • A supply of nuclear weapons kept by a country; a nuclear stockpile. 

  • A pile of coal or ore heaped up on the ground after it has been mined. 

verb
  • To accumulate or build up a supply of (something). 

  • To build up a stock of (nuclear weapons). 

  • To heap up piles of (coal or ore) on the ground after it has been mined. 

  • To build up a supply; to accumulate. 

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