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

...omise or reconstruction. After the vote on the constitution was taken, Jefferson Davis was elected President, and Alexander H. Stevens Vice-President of the Southern Confederacy, by the Congress.--( Doc . 34.)--Commercial Advertiser. Brigs W. R. Kibby and Golden Lead; barks Adjuster and C. Colden Murray; and schooner Julia A. Hallock, all owned in New York, were seized in the harbor of Savannah...
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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