A very long period. The Knickerbocker Magazine (1836) has “a dog’s age”: vii. 17 (Jan.).

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1845.  We won’t hear the eend of this bis’ness for a coon’s age, you see if we do.—W. T. Thompson, ‘Chronicles of Pineville,’ p. 72 (Phila.).

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1845.  He can talk more sense in a minute than old Rogers can understand in a coon’s age.Id., p. 128.

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1846.  Jim Clark has gone to the woods for fat pine, and Peggy Willet is along to take a lite for him,—they’ve been gone a coon’s age.—W. T. Porter, ed., ‘A Quarter Race in Kentucky,’ etc., p. 85.

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1848.  I never did like this Yanky way of married people livin’ all over creation without seein one another more’n once in a coon’s age.—W. T. Thompson, ‘Major Jones’s Sketches of Travel,’ p. 16 (Phila.).

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1851.  We had not seen the amount of cash mentioned as lost, in a “coon’s age.”—J. J. Hooper, ‘Adventures of Captain Simon Suggs,’ &c., p. 155 (Phila.).

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1851.  “That’s the best red eye I’ve swallered in er coon’s age,” said the speaker, after bolting a caulker.—‘Polly Peablossom’s Wedding,’ &c., p. 74.

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1851.  This child hain’t had that much money in a coon’s age.Id., p. 99.

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1853.  Hello, old hoss, whar hev you been this coon’s age?—S. A. Hammett (‘Philip Paxton’), ‘A Stray Yankee in Texas,’ p. 201.

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