Thus the mind of Frick was exactly of the sort for Mr. Solomon Featherstone to work upon, he having more plenteous ideas of the same order, with a suspicion of heaven and earth which was better fed and more entirely at leisure.
This streak of bitterness came from a plenteous source, and kept widening in the current of his thought as he neared Lowick Gate.
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.