off-off year
n.— «The “off-off” year elections, as they are called, offer Fairfax County voters more choices than ever, as all 10 seats on the Board of Supervisors, 12 School Board positions, all the General Assembly positions (nine Senate seats and 17 delegate seats in Fairfax County alone), three Soil and Water Conservation District slots, the Commonwealth’s Attorney, the Sheriff, and only once every eight years, the Clerk of the Court. That’s 54 seats in all, just in Fairfax County. » —“A Penny for Your Thoughts: The News of Greater Falls Church” by Penny Gross Falls Church News-Press (Virginia) Nov. 9, 2006. (source: Double-Tongued Dictionary)