Salt Shaker Cool Down

[Bellator]

Finally reached a point where I needed to use my Salt Shaker and it has a 3 day cool down! OK so here is the first question, is that 3 day cool down, RL days? When I place the cursor over the shaker I don't get the usual clock like timer with the Hearthstone. If there is no clock timer how do I tell when the shaker is ready again? I mean, just guess at 3 days and try it?

Thanks for your help all.

Bellator