  Fixing a subgroup $\Gamma$ in a group $G$, the full commensurability growth
function assigns to each $n$ the cardinality of the set of subgroups $\Delta$
of $G$ with $[\Gamma: \Gamma \cap \Delta][\Delta : \Gamma \cap \Delta] \leq n$.
For pairs $\Gamma \leq G$, where $G$ is a Chevalley group scheme defined over
$\mathbb{Z}$ and $\Gamma$ is an arithmetic lattice in $G$, we give precise
estimates for the full commensurability growth, relating it to subgroup growth
and a computable invariant that depends only on $G$.
