Statistics for occurrence #1 of “United States” in entry senate-united-states of Harper's Encyclopedia of United States History:

...mmittee of the whole House for the purpose of prosecuting the impeachment and attend in that manner, though none of them but the managers takes part in the proceedings. When the President of the United States is on trial, the chief-justice presides. The following is a copy of the opening entry on the journal of proceedings of the trial of the impeachment of President Johnson, March 30, 1868: A...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 16,340 0 0 0 user votes
United States (New Mexico, United States) 6 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.