mission vs role

mission

noun
  • A set of tasks that fulfills a purpose or duty; an assignment set by an employer, or by oneself. 

  • Religious evangelism. 

  • An infrequent gathering of religious believers in a parish, usually part of a larger regional event with a central theme. 

  • A number of people appointed to perform any service; a delegation; an embassy. 

  • A settlement or building serving as a base for missionary work. 

  • Third World charities, particularly those which preach as well as provide aid. 

verb
  • To do missionary work, proselytize. 

  • To send on a mission. 

role

noun
  • Designation that denotes an associated set of responsibilities, knowledge, skills, and attitudes 

  • In the Raku programming language, a code element akin to an interface, used for composition of classes without adding to their inheritance chain. 

  • The function of a word in a phrase. 

  • An ancient unit of quantity, 72 sheets of parchment. 

  • A character or part played by a performer or actor. 

  • The expected behaviour of an individual in a society. 

  • The function or position of something. 

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