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

...n of Pennsylvania issued a proclamation calling a meeting of the State Legislature for the 30th of April, to take into consideration and adopt such measures as the present emergencies may demand. --( Doc . 75.)--Philadelphia Press. A letter was received at Philadelphia from Governor Letcher, of Virginia, offering $30,000 to the patentee of the bullet mould. The reply was no money can purchase ...
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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