The designation and the duration of the terms of the Superior Court in and for each county, and the nature of the proceedings to be conducted at each such term, shall be determined by the Superior Court and shall be announced by rule of court, duly adopted and promulgated pursuant to the authority vested in the Superior Court by the provisions of § 561 of this title and § 5121 of Title 11, provided that not less than 4 terms of Court a year shall be established in each county of the State.