Investigation continues of detergent foam images as analogue/digital (A/D) model fluids. Attention turns to the radial distribution function G(r) and how it is partitioned in terms of individual neighborships:first, second, third, etc. Data are illustrated for liquid-and gaslike systems, and key features of the neighborship partition are enumerated. Data are compared with mathematical constructs offered by the ideal gas, hard disk, and hexagonal crystalline models. Such comparison points to an indirect method for partitioning G(r) into neighborship distributions in agreement with experiment. Notably, the method requires no specification of particle shapes and potentials. The indirect method is applied to liquid sodium using X-ray data of previous researchers. Structures of liquid sodium are offered via an alternative, empirical way.