When they went down, uncle Pullet observed, with some acumen, that he reckoned the missis had been showing her bonnet,—that was what had made them so long upstairs.
She could have informed you that there was such a word as "polygamy," and being also acquainted with "polysyllable," she had deduced the conclusion that "poly" mean "many"; but she had had no idea that gypsies were not well supplied with groceries, and her thoughts generally were the oddest mixture of clear-eyed acumen and blind dreams.
There are no more uses of "acumen" in the book.
Show samples from other sources
She built a very successful company with uncommon business acumen.
With her customary acumen, she brought the new division to profitability within a year.