This word seems to have escaped the lexicographers. Meaning obvious.

1

1799.  The land adjoining and including Frog Pond, situated in said town of Newburyport.—Mass. Mercury, Feb. 19.

2

1799.  The hero who performed such wonders at the Kensington (Phila.) frog-pond.The Aurora, Phila., May 28.

3

1825.  Winkin’ away, jess like so many milk adders, at a frog pond.—John Neal, ‘Brother Jonathan,’ i. 143.

4

1829.  The centre [of the district] had been discovered exactly in the centre of a frog-pond.—Sarah J. Hale, ‘American Sketches,’ p. 121 (Boston).

5

1854.  You know no more of its terrors than a man on a frog-pond in a rain-storm knows how the Atlantic looks in a hurricane.—Yale Lit. Mag., xix. 363 (Aug.).

6

1859.  After a man begins to attack the State-House, when he gets bitter about the Frog-Pond, you may be sure there is not much left of him.—Holmes, ‘The Professor at the Breakfast-Table,’ chap. xi.

7