Statistics for occurrence #1 of “Pennsylvania” in chapter 1 of William Schouler, A history of Massachusetts in the Civil War: Volume 1:

... eastward of all the States in the Union. Its capital is four hundred and fifty miles east of Washington, and is separated from it by the States of Rhode Island, Connecticut, New York, New Jersey, Pennsylvania , Delaware, and Maryland. It contains seven thousand eight hundred square miles of land, river, lakes, and sea. In 1860, it had a population of 1,231,066, engaged in farming, manufacturing, fishing,...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Pennsylvania (Pennsylvania, United States) 12,690 32 2 0 0 user votes

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