The aim of this paper is to reevaluate the Bergsonian concept of duree, understood as a coexistence of heterogeneous levels of multiplicity. Although this concept has been thought of from a point of view that could be characterized as "continuist", Bergson himself avoids confusing this continuity with the idea of homogeneity. We will try to show that the determination of the concept of duree is reached by defining it as a tension or interlacement between succession and simultaneity, and therefore as a multiplicity based on the coexistence of different flows of duration. Bergson proposes the existence of an impersonal and unique time as the basis for the relationship between durations. Our proposal is that this same situation can be better understood through the concept of rhythm as articulated in Deleuze's work, a concept closely linked to the notions of Duree and coexistence. Through the movements of contraction, dilation, reunion, and division, rhythm operates along with the available durations as a field of relation, being able to occupy the place that had been assigned to unique time.