commissioning vs mandate

commissioning

noun
  • The process of assuring that all systems and components of a major piece of equipment, a process, a building or similar are designed, installed and tested according to the operational requirements of the owner or final client. 

mandate

noun
  • An official or authoritative command; an order or injunction; a commission; a judicial precept; an authorization. 

  • An order by the League of Nations to a member nation to establish a government responsible for a conquered territory, as the colonies of Germany after World War I. 

  • A period during which a government is in power. 

  • Such a territory. 

  • The order or authority to do something, as granted to a politician by the electorate. 

verb
  • To authorize. 

  • To make mandatory. 

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