Statistics for occurrence #1 of “Breckenridge” in chapter 16 of William H. Herndon, Jesse William Weik, Herndon's Lincoln: The True Story of a Great Life, Etiam in minimis major, The History and Personal Recollections of Abraham Lincoln by William H. Herndon, for twenty years his friend and Jesse William Weik:

... Breckenridge
Effect of the canvass of 1858 on Lincoln's pocket-book. attempts to lecture. on the stump with Douglas in Ohio. in...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Breckenridge 722 14 108 0 0 user votes
John C. Breckenridge 120 0 8 0 0 user votes
J. C. Breckenridge 68 0 4 0 0 user votes
Major-Generals Breckenridge 50 0 0 0 0 user votes
James Breckenridge 28 0 2 0 0 user votes
Hill Breckenridge 24 0 0 0 0 user votes
Samuel M. Breckenridge 11 0 1 0 0 user votes
Robert J. Breckenridge 9 0 1 0 0 user votes
John Breckenridge 6 0 0 0 0 user votes
Cabell R. Breckenridge 3 0 1 0 0 user votes
J. Breckenridge 3 0 1 0 0 user votes
R. W. J. Breckenridge 2 0 0 0 0 user votes
W. C. P. Breckenridge 2 0 0 0 0 user votes
Carey Breckenridge 1 0 1 0 0 user votes
Cary Breckenridge 1 0 1 0 0 user votes
Margaret E. Breckenridge 1 0 1 0 0 user votes
Mary C. Breckenridge 1 0 1 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.