class vs variety

class

noun
  • A rank in the classification of organisms, below phylum and above order; a taxon of that rank. 

  • One of the sections into which a Methodist church or congregation is divided, supervised by a class leader. 

  • A group of students in a regularly scheduled meeting with a teacher. 

  • A grouping of data values in an interval, often used for computation of a frequency distribution. 

  • A group of students who commenced or completed their education during a particular year. A school class. 

  • A collection of sets definable by a shared property. 

  • A group, collection, category or set sharing characteristics or attributes. 

  • Best of its kind. 

  • A set of objects having the same behavior (but typically differing in state), or a template defining such a set in terms of its common properties, functions, etc. 

  • The division of society into classes. 

  • Admirable behavior; elegance. 

  • A category of seats in an airplane, train or other means of mass transportation. 

  • A group of people subject to be conscripted in the same military draft, or more narrowly those persons actually conscripted in a particular draft. 

  • A social grouping, based on job, wealth, etc. In Britain, society is commonly split into three main classes: upper class, middle class and working class. 

  • A series of lessons covering a single subject. 

adj
  • great; fabulous 

verb
  • To assign to a class; to classify. 

  • To be grouped or classed. 

  • To divide into classes, as students; to form into, or place in, a class or classes. 

variety

noun
  • A rank in a taxonomic classification below species and (if present) subspecies, and above form; hence, an organism of that rank. 

  • The total number of distinct states of a system; also, the logarithm to the base 2 of the total number of distinct states of a system. 

  • An animal or plant (or a group of such animals or plants) with characteristics causing it to differ from other animals or plants of the same species; a cultivar. 

  • In universal algebra: an equational class; the class of all algebraic structures of a given signature, satisfying a given set of identities. 

  • A specific form of a language, neutral to whether that form is an accent, dialect, register, etc., and to its prestige level; an isolect or lect. 

  • A collection or number of different things. 

  • The kind of entertainment given in variety performances or shows; also, the production of, or performance in, variety performances or shows. 

  • A deviation or difference. 

  • A stamp, or set of stamps, which has one or more characteristics (such as colour, paper, etc.) differing from other stamps in the same issue, especially if such differences are intentionally introduced. 

  • The quality of being varied; diversity. 

  • A specific variation of something. 

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