So I need help potty training. I work m-f 10-6. My so works m-f 530-whenever the job is done. His…

So I need help potty training. I work m-f 10-6. My so works m-f 530-whenever the job is done. His mother and grandma babysit all week. Our daughter will be there in January and tells us when she has to go potty. We’ve got her to sit a couple times but since we work all day those two times don’t really mean anything, and they’re not even trying. How can I get her potty trained in two days? I understand it shouldn’t be his mothers job to potty train our child but she offered to babysit, and what are we expected to do when we work all week?