Korean Political History II: Chapter 1, Exercise 1 — Possible Solution
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                President                     National Assembly
Term            single five-year term          four years
Chosen          direct vote, first past the    members elected (constituency
                post                           and proportional seats)
One power       veto (two-thirds override),    enacts laws and approves the
                pardons, emergency powers      budget

CAUTION
The source does not say how often elections coincide.