I can tell you that slow-cooked stews are typically cooked for several hours to allow the flavors to meld and the meat to become tender. The exact cooking time can vary depending on the recipe and the type of meat used.
In some cases, slow-cooked stews can be simmered for 4 to 8 hours or even longer. Some recipes may recommend overnight cooking, especially if using a slow cooker or crockpot on a low setting. However, it's essential to follow the specific instructions in the recipe you're using to ensure the best results and to avoid overcooking the ingredients.