company vs concern

company

noun
  • Any business, whether incorporated or not, that manufactures or sells products (also known as goods), or provides services as a commercial venture. 

  • A small group of birds or animals. 

  • A group of individuals who work together for a common purpose. 

  • Companionship. 

  • A unit of firefighters and their equipment. 

  • An entity having legal personality, and thus able to own property and to sue and be sued in its own name; a corporation. 

  • The entire crew of a ship. 

  • Social visitors or companions. 

  • An intelligence service. 

  • A unit of approximately sixty to one hundred and twenty soldiers, typically consisting of two or three platoons and forming part of a battalion. 

concern

noun
  • A business, firm or enterprise; a company. 

  • The placement of interest or worry on a subject. 

  • The expression of solicitude, anxiety, or compassion toward a thing or person. 

  • That which affects one’s welfare or happiness. A matter of interest to someone. 

  • A worry; a sense that something may be wrong; an identification of a possible problem. 

  • Any set of information that affects the code of a computer program. 

verb
  • To engage by feeling or sentiment; to interest. 

  • To relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to. 

  • To make somebody worried. 

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