Douglas Harper's Etymology Dictionary
Usage examples of "twelve-month".
So that it will be yet a twelve-month before we shall be able to judge of the efficacy of our land office to sink our national debt.
Every one looks upon the taking of any one of them as a work of great difficulty and time, their walls being so strong, their ditches so deep, their works so regular and well provided with cannon, and their stores and magazines always furnished for a twelve-month.
According to court records, Byers received only a twelve-month suspended sentence, despite the assurance he’.