The second arc is when J.D.'s cousin inspires him to join the Marines immediately after 9/11. (inc.com)
Each of us has an arc line directly above the head from earlobe to earlobe, and women have a second arc line from breast to breast. (mindbodygreen.com)
Often playing almost half her age, she has to bring Strayed to rock bottom in what could be constituted as a second arc for the character. (awardswatch.com)