The time taken for the cell to divide and pass through the entire epithelium is known as:
Differentiation – After mictosis, during its migration, a keratinocyte becomes committed to biochemical & morphologic changes.
Desquamation – Process of shedding of surface epithelial cells.
Maturation – Process of cell migration from the basal layer to the surface.
Turnover time / rate – The time taken for the cell to  divide & pass through the entire epithelium.
Differentiation.
Turn over time.
Desquamation.
Maturation.