Statistics for occurrence #1 of “Doc” in year 1861, month August, day 21 of Rebellion Record: a Diary of American Events, Diary from December 17, 1860 - April 30, 1864:

...uthern wrongs. In Confederate Congress in session at Richmond, Va., a resolution of thanks to Ben McCulloch and his forces, was introduced by Mr. Ochiltree of Texas, and passed unanimously.--( Doc . 205.) This day a very large and beautiful flag was presented to the battalion of Pennsylvania troops stationed at Annapolis Junction, Md., by the Union ladies of Prince George's and Montgomery...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Doc 6,842 2,810 2 0 0 user votes
N. Y. Doc 1,108 0 0 0 0 user votes
Y. S. M. Doc 78 0 0 0 0 user votes
London Doc 4 0 0 0 0 user votes

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