Conceptually, both sports and academic scholarships are held annually, which means that the signing of a scholarship only involves one academic year.
It is true, however, that coaches, with a few exceptions, tend to offer a place in the team with a scholarship that can be renewed under the same conditions in the following years and for the period necessary to complete the study plan. In particular, if a player is recruited from a 2-year junior college, the coach will set aside the scholarship for both years but effectively the scholarship will be renewed for the second year at the end of the academic year, usually around mid-May, after the academic and sports evaluation of the year just ended.