individual vs irregular

individual

noun
  • A person considered alone, rather than as belonging to a group of people. 

  • An object, be it a thing or an agent, as contrasted to a class. 

  • An element belonging to a population. 

  • A single physical human being as a legal subject, as opposed to a legal person such as a corporation. 

adj
  • Intended for a single person as opposed to more than one person. 

  • Not divisible without losing its identity. 

  • Relating to a single person or thing as opposed to more than one. 

irregular

noun
  • One who does not regularly attend a venue. 

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

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 

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