What is Dimensional Formula of Distance traveled in nth second?

Distance traveled by the particle in nth second is defined as the difference between the distance travelled by the particle in n second and the distance travelled by the particle in (n-1) second.

Mathematically,
Distance travelled in nth second= Distance/Time.

Dimensional Formula of Distance= M⁰L¹T⁰.
Dimensional Formula of Time= M⁰L⁰T¹.

Putting these values in above equation we get,

Dimensional Formula of Distance traveled in nth second = M⁰L¹T⁰/M⁰L⁰T¹ = M⁰L¹T^-1
SI unit of  Distance traveled in nth second is ms^-1.