different between trilogy vs duology

English

Latin & New Latin trilogia, from Ancient Greek ????? (treîs, “three”) + ????? (lógos, “story, account”).

trilogy (plural trilogies)

A set of three works of art that are connected, and that can be seen either as a single work or as three individual works. They are commonly found in literature, film, or video games.
- 22 March 2012, Scott Tobias, AV Club The Hunger Games[1]
  That such a safe adaptation could come of The Hunger Games speaks more to the trilogy’s commercial ascent than the book’s actual content, which is audacious and savvy in its dark calculations.

Coined based on Latin duo (“two”) + Ancient Greek ????? (lógos, “word”).

duology (plural duologies)

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