aggregation vs reservoir

aggregation

noun
  • The act of collecting together (aggregating). 

  • The state of being collected into a mass, assemblage, or sum (aggregated). 

  • Summarizing multiple routes into one route. 

  • The majority of the parasite population concentrated into a minority of the host population. 

  • Kind of object composition which does not imply ownership. 

  • A collection of particulars; an aggregate. 

reservoir

noun
  • A supply or source of something. 

  • A species that acts as host to a zoonosis when it is not causing acute illness in other susceptible species. 

  • A "black box" component that receives an input signal to be read out and mapped by another process, as part of reservoir computing. 

  • A small intercellular space, often containing resin, essential oil, or some other secreted matter. 

  • A large natural or artificial lake used as a source of water supply. 

  • A place where anything is kept in store. 

verb
  • To store or keep (something) in or as in a reservoir. 

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