irregular vs median

irregular

adj
  • without symmetry, regularity, or uniformity 

  • rough 

  • not regular; having sides that are not equal or angles that are not equal 

  • whose faces are not all regular polygons (or are not equally inclined to each other) 

  • nonstandard; not conforming to rules or expectations 

  • not following the regular or expected patterns of inflection in a given language 

noun
  • A soldier who is not a member of an official military force and who may not use regular army tactics. 

  • One who does not regularly attend a venue. 

median

adj
  • Situated in a middle, central, or intermediate part, section, or range of (something). 

  • In the middle of an organ, structure etc.; towards the median plane of an organ or limb. 

  • Having the median as its value. 

noun
  • A number separating the higher half from the lower half of a data sample, population, or probability distribution. The median of a finite list of numbers can be found by arranging all the observations from lowest value to highest value and picking the middle one (e.g., the median of {3, 3, 5, 9, 11} is 5). If there is an even number of observations, then there is no single middle value; the median is then usually defined to be the mean of the two middle values. 

  • A line segment joining the vertex of triangle to the midpoint of the opposing side. 

  • The area separating two lanes of opposite-direction traffic; the median strip. 

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