fire brigade vs profession

fire brigade

noun
  • A group of people within a corporation or industrial site, organized for the purpose of putting out fires, usually in addition to their normal job. 

  • An organization, often part of a local government, whose purpose is preventing and putting out fires. 

  • A trained unit that can be rapidly deployed to deal with any difficult situation. 

profession

noun
  • The practitioners of such an occupation collectively. 

  • The declaration of belief in the principles of a religion; hence, one's faith or religion. 

  • A promise or vow made on entering a religious order. 

  • Any declaration of belief, faith or one's opinion, whether genuine or (as now often implied) pretended. 

  • An occupation, trade, craft, or activity in which one has a professed expertise in a particular area; a job, especially one requiring a high level of skill or training. 

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