It's not a bad replacement. Why do you want to rewrite the sentence at all? CJ
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CalifJimWhy do you want to rewrite the sentence at all?"Acumen" seems more commonly used than "shrewdness".
avid learner"Acumen" seems more commonly used than "shrewdness".Oh, I see. You got the statistics by reviewing the corpora available on-line? And you're preparing the text for students in a less advanced level?
avid learnerGood old googleYes. As it turns out, fraze.it gives similar results.