How many times??

So how many times does it take for a 3 year old to not walk on a wet floor that I just mopped I have told my daughter that is 3 not to walk on the floor bcuz it's wet she seen me mop it i have to tell her a few times a week bcuz I clean my house a lot and yet she still falls on her butt  Bcuz she still walks on the floor anyone eles go through this or how many times more should this happen