Uih i should recommand doing using a HashMap, in the HashMap(int time, Player player), at server start you create a scheduler wich is called evry second and you remove 1 from evry player. If he uses the command /kit (yourkit) then you are checking if his cooldown is <0 and you set it if it is <0 back to 50
@Webb This is in Bukkit Help not Plugin Development, also he said he is using a plugin already so it is safe to assume they want a plugin that does the same thing with cooldowns or they want to know how to configure the existing plugin to have it.