The article analyses the formulations on historical time made by Fernand Braudel and Reinhart Koselleck and their interconnections. In the first part, after reviewing the central aspects of the Braudelian model it demonstrates how Koselleck appropriated it, renewing and radicalizing it by a double procedure of condensation and complexification. In the second part, through a brief historiographic survey it explores the potentialities of Braudelian / Kosellekian theorization for the study of New World Slavery, presenting a renewed research agenda.