The drop exit frequency model developed in the literature is modified and simplified to suit the practical situations. An adjusting factor is inserted in the exit frequency model to account for the simplification of the hydrodynamic pattern used in the analysis and the incorrect constants used in the rise velocity model. The holdup profiles calculated in the present analysis are compared with experimental and theoretical results in the literature to evaluate the model. The comparison shows good agreement between the present model and the experimental data. Even for the cases of poor agreement, the breakage and coalescence rates are adjusted, and the stages of quasi-equilibrium state are determined to improve the results.