The state shall be divided into judicial circuits, each of which shall consist of not less than one county. Each county shall have at least one superior court, magistrate court, a probate court, and, where needed, a state court, a juvenile court, and a business court division of superior court. The General Assembly may provide by law that the judge of the probate court may also serve as the judge of the magistrate court. In the absence of a state court or a juvenile court, the superior court shall exercise that jurisdiction. Superior courts shall hold court at least twice each year in each county.