article vs retraction

article

noun
  • A section of a legal document, bylaws, etc. or, in the plural, the entire document seen as a collection of these. 

  • A piece of nonfictional writing such as a story, report, opinion piece, or entry in a newspaper, magazine, journal, dictionary, encyclopedia, etc. 

  • A genuine article. 

  • A part or segment of something joined to other parts, or, in combination, forming a structured set. 

  • An object, a member of a group or class. 

  • A part of speech that indicates, specifies and limits a noun (a, an, or the in English). In some languages the article may appear as an ending (e.g. definite article in Swedish) or there may be none (e.g. Russian, Pashto). 

verb
  • To bind by articles of apprenticeship. 

  • To formulate in articles; to set forth in distinct particulars. 

retraction

noun
  • A continuous function from a topological space onto a subspace which is the identity on that subspace. 

  • An act or instance of retracting. 

  • A statement printed or broadcast in a public forum which effects the withdrawal of an earlier assertion, and which concedes that the earlier assertion was in error. 

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