Statistics for occurrence #1 of “Doc” in chapter 1, page v of Rebellion Record: a Diary of American Events: Index, Volume 1.:

...meeting, N. Y., Doc. Everett, Edward, address of, at New York, July 4, 1861, Int. 5; speech at Boston, D. , ; speech at Chester Square, Boston, April 27, Doc. ; address at Roxbury, Mass., Doc . Everett, —, Lieut.-Col., D. , Ewing, Andrew, Doc. Ewing, Edwin H., a traitor, D. ; speech at Nashville, Doc. Expedition. a newspaper of the Penn. Fifth Regim...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
N. Y. Doc 1,108 1,108 0 0 0 user votes
Doc 6,842 0 2 0 0 user votes
Y. S. M. Doc 78 78 0 0 0 user votes
London Doc 4 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.