plan vs tangent

plan

noun
  • A two-dimensional drawing of a building as seen from above with obscuring or irrelevant details such as roof removed, or of a floor of a building, revealing the internal layout; as distinct from the elevation. 

  • A drawing showing technical details of a building, machine, etc., with unwanted details omitted, and often using symbols rather than detailed drawing to represent doors, valves, etc. 

  • A subscription to a service. 

  • A set of intended actions, usually mutually related, through which one expects to achieve a goal. 

  • A method; a way of procedure; a custom. 

verb
  • To create a plan for. 

  • To intend. 

  • To design (a building, machine, etc.). 

  • To make a plan. 

tangent

noun
  • A visual interaction between two or more lines or edges that creates a perceived relationship between them, often in a way that the artist did not intend. 

  • A function of an angle that gives the ratio of the sine to the cosine, in either the real or complex numbers. Symbols: tan, tg. 

  • A topic nearly unrelated to the main topic, but having a point in common with it. 

  • A small metal blade in a clavichord that strikes the strings to produce sound. 

  • A straight line touching a curve at a single point without crossing it there. 

adj
  • Straight; not horizontally curved. 

  • Touching a curve at a single point but not crossing it at that point. 

  • Of a topic, only loosely related to a main topic. 

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