  Multiorbital systems away from global half-filling host intriguing physical
properties promoted by Hund's coupling. Despite increasing awareness of this
regime dubbed Hund's metal, effect of nonlocal interaction is still elusive.
Here we study a three-orbital model with $1/3$ filling (two electrons per site)
including the intersite Coulomb interaction ($V$). Using the $GW$ plus extended
dynamical mean-field theory, the valence-skipping charge order transition is
shown to be driven by $V$. Most interestingly, the instability to this
transition is significantly enhanced in the spin-freezing crossover regime,
thereby lowering the critical $V$ to the formation of charge order. This
behavior is found to be closely related to the population profile of the atomic
multiplet states in the spin-freezing regime. In this regime, maximum spin
states are dominant in each total charge subspace with substantial amount of
one- and three-electron occupations, which leads to almost equal population of
one- and the maximum spin three-electron state. Our finding unveils another
feature of the Hund's metal, and has potential implications for the broad range
of multiorbital systems as well as the recently discovered charge order in
iron-pnictides.
