It was now for more than the middle span of our allotted years that he had passed through the thousand vicissitudes of existence and, being of a wary ascendancy and self a man of rare forecast, he had enjoined his heart to repress all motions of a rising choler and, by intercepting them with the readiest precaution, foster within his breast that plenitude of sufferance which base minds jeer at, rash judgers scorn and all find tolerable and but tolerable.
There are no more uses of "plenitude" in the book.
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There was simply combined with the thought of Leslie’s imminent appearance a stirring awareness—I confess without shame—of this plenitude of money.
William Styron -- Sophie’s Choice
Back at the Barbours’, amidst the clamor and plenitude of a family that wasn’t mine, I now felt even more alone than usual—especially since, as the end of the school year neared, it wasn’t clear to me (or Andy either, for that matter) if I would be accompanying them to their summer house in Maine.