How long does it take for the Dragon Balls after being used, to be used again since Dende became God of Earth?

[SIAD]

How long does it take for the Dragon Balls after being used, to be used again since Dende became God of Earth?

 

[Symbiote]

Isn’t it a year?

 

[Hector]

As long as the plot needs.

 

[GSM123]

It’s always been a year. But since it became 3 wishes it can be less if you don’t use all three. 4 months per wish.