Pooping multiple times a day.

Hello everyone, we have a great Pyrenees german shep mix and she poops 2-4 times a day. Just an absolute crap dispenser. Im wondering if any of you have dogs similar to this situation and how to regulate it to 2 times a day max. We feed her around 5-6pm every day. She goes in the morning, middle of the day, and at night. How do i train her to not go in the middle of the day? Luckily i work from home but i dont want to go to the office with fear of coming home to mountains of poop. I didnt think a dog could go this many times in a day. I thought in the morning and at night should be enough potty wise. Plz help.