Once More Meaning

Example: Again, a further time, once again.
1913, Joseph C. Lincoln, chapter 4, Mr. Pratt's Patients:
  I told him about everything I could think of; and what I couldn't think of he did. He asked about six questions during my yarn, but every question had a point to it. At the end he bowed and thanked me once more. As a thanker he was main-truck high; I never see anybody so polite.
1918, W. B. Maxwell, chapter 5, The Mirror and the Lamp:
  Then everybody once more knelt, and soon the blessing was pronounced. The choir and the clergy trooped out slowly, […], down the nave to the western door.
Used other than as an idiom: see once,‎ more.