Hours for loading - unloading bulk carrier

Hello to everyone

I would like to make a question.

How many hours want for loading - unloading a bulk carrier of 15.000 dwt. The material is basalt

I know that it is difficult to answer me exactly and depends on facilities but i would like approximate.

thanks a lot

Where you unloading?
A facility with infrastructure? Could be 12 hrs, or you heading to grand ole Africa where it’ll take a week?