Duology vs. Trilogy

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Difference Between Duology and Trilogy
Duologynoun
(nonstandard) A series comprising two parts, particularly in genre fiction.
Trilogynoun
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.
Trilogynoun
a set of three literary or dramatic works related in subject or theme
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