Asteroid-Man said:

Consider this: a full-time editor is supposed to finish editing a film in 1-3 months for a feature film, and then there's also 2-6 months for effects.

It depends on what you're up against.

To name one editor's work (Uncanny Antman);
Jericho Cane took him one month only (on-and-off).
If he could have worked non-stop, he probably would have finished his work in half that time.
Dark Angel: Children of the Revolution, on the other hand, took him around a full year, again, with on-and-off periods.

CBB worked only 9 weeks on War of the Worlds, Extinctive Cut,
and a measly 15 days on Reflections.

It depends on what you're planning to do with your edit, how much free time you have (you can not predict future events), and not to mention the experience and materials you have at your disposal.