agency vs instrumentation

agency

noun
  • The capacity, condition, or state of acting or of exerting power. 

  • A medium through which power is exerted or an end is achieved. 

  • A department or other administrative unit of a government; also, the office or headquarters of, or the district administered by such unit of government. 

  • An establishment engaged in doing business for another; also, the place of business or the district of such an agency. 

  • The office or function of an agent; also, the relationship between a principal and that person's agent. 

  • The capacity of individuals to act independently and to make their own free choices. 

instrumentation

noun
  • The act or manner of playing upon musical instruments; performance. 

  • The dynamic analysis of a program's performance and behaviour, usually by injecting profiling code into it. 

  • On a vehicle, dashboard gauges monitoring engine functions and performance, along with other essential functions. 

  • The act of using or adapting as an instrument; a series or combination of instruments. 

  • The arrangement of a musical composition for performance by a number of different instruments; instrumental composition; composition for an orchestra or military band. 

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