An amicable divorce means that both parties accept property division, joint and spousal custody, child and spousal support and visitation. It does not mean the divorcing spouses are even friends at this point. It does not mean they do not fight and reach an amicable agreement fairly, without recourse to litigation.
It is much easier for the parties to agree on these issues if they have been married for at least five years. The parties may have reached this time before or after the divorce is finalized. The duration of a divorce also varies based upon whether one or both of the spouses have children. If there are children, the length of the divorce will also be more protracted than it would be if there were none involved.