I might have seen there was too great a disparity between the ages of the parties to make it likely that they were man and wife.
There are no more uses of "disparity" in the book.
Show samples from other sources
In the 1980s, the Court rejected a constitutional challenge to imposing the death penalty on juveniles; upheld the death penalty for disabled people suffering from "mental retardation"; and, in a widely condemned opinion, found no constitutional violation in the extreme racial disparities that could be seen throughout most death penalty jurisdictions.
Bryan Stevenson -- Just Mercy
As much as possible they try to avoid any huge disparities in intelligence, temperament, social background, and age.