As Barry said, why are you fixing what the plumber did wrong?
And grout should dry in a few hours by evaporation. Not sure why this an issue. Just the other day I had my kids toilet off because it was rocking. Turns out the plastic better than wax seal was slightly crimped when installed and let water out which rotted the subfloor, and the toilet flange screws pulled out. Make sure the seal is installed properly when you put the toilet back on.