appointment vs commissioning

appointment

noun
  • The exercise of the power of designating (under a power of appointment) a person to enjoy an estate or other specific property; also, the instrument by which the designation is made. 

  • An honorary part or exercise, as an oration, etc., at a public exhibition of a college. 

  • An arrangement between people to meet; an engagement. 

  • Equipment, furniture. 

  • Stipulation; agreement; the act of fixing by mutual agreement. 

  • The state of being appointed to a service or office; an office to which one is appointed 

  • Decree; direction; established order or constitution. 

  • The assignment of a person by an official to perform a duty, such as a presidential appointment of a judge to a court. 

  • The act of appointing a person to hold an office or to have a position of trust 

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. 

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