  The rejection of the contamination, or background, from low-energy strong
interactions at hadron collider experiments is a topic that has received
significant attention in the field of particle physics. This article builds on
a particle-level view of collision events, in line with recently-proposed
subtraction methods. While conventional techniques in the field usually
concentrate on probability distributions, our study is, to our knowledge, the
first attempt at estimating the frequency distribution of background particles
across the kinematic space inside individual collision events. In fact, while
the probability distribution can generally be estimated given a model of
low-energy strong interactions, the corresponding frequency distribution inside
a single event typically deviates from the average and cannot be predicted a
priori. We present preliminary results in this direction, and establish a
connection between our technique and the particle weighting methods that have
been the subject of recent investigation at the Large Hadron Collider.
