When Putnam County was established in 1812, Frost was appointed Surrogate and returned to his birthplace which was the county seat. He served as Surrogate until 1813, and again from 1815 to 1819, and 1821 to 1822.
Frost's appointment as Surrogate occurred when Putnam County was created in 1812, and he returned to his hometown, the county seat. He served two separate terms: one from 1813 to 1815, and another from 1819 to 1821, with a brief tenure from 1821 to 1822.