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

...other Frenchmen ascend the Mississippi from the mouth of the Illinois to the falls of St. Anthony, leaving Fort Crevecoeur, Ill......Feb. 28, 1680 Wife of Peosta, a Fox warrior, discovers lead in Iowa , on the west bank of the Mississippi......1780 At a council at Prairie du Chien, Julien Dubuque, a French-Canadian trader, obtains from Indians permission to work lead-mines at the place now bear...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Iowa (Iowa, United States) 1,742 310 0 0 0 user votes
Iowa (Iowa, United States) 0 0 0 0 0 user votes
Iowa (Louisiana, United States) 0 0 0 0 0 user votes
Iowa (Pennsylvania, United States) 0 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.