delegation vs diplomatic mission

delegation

noun
  • A group of delegates used to discuss issues with an opponent. 

  • An act of delegating. 

  • The act whereby or constellation in which the performance of an obligation (owed to an obligee, presuming its validity; irrespective of the obligation as the target of the delegation, rarely called delegatary) is assigned by its debtor (delegator, obligor) to and towards another party (delegatee, delegate) 

  • A method-dispatching technique describing the lookup and inheritance rules for self-referential calls. 

diplomatic mission

noun
  • A group of people (including diplomats) from one nation present in another as authorized representatives of the first, a foreign mission. 

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