There is thus no separation of time scales into fast and slow processes. (iii) A significant fraction of the identified processes are collective, involving the significant displacement of more than two atoms. Only 43% (1261) of all processes seem simple in the sense that they displace only one or two atoms. (iv) While on average processes that move fewer atoms have lower barriers, the distribution for both few-and many-atom process barriers is wide, and there are multiple collective processes with barriers below the 1 eV threshold. This result also holds when evaluating the prefactors and plotting the distribution of hTST rate constants (Fig. in the SI). There is thus counter-intuitively no attempt frequency penalty for the movement of multiple atoms. It appears that the initial oxidation of the Pd(110) edge may thus indeed involve many fast non-intuitive collective processes.