Number of clouds that interact during a merger event between two neighboring snapshots (y-axis) as a function of time cadence (x-axis). Crosses show the mean, while error bars correspond to the 1σ variation. While the average is ∼ 5 when the snapshot cadence is as coarse as ∼ 100 Myr, it is close to 2 at out best available snapshot spacing, suggesting that all pairwise merger events are correctly identified.