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

... Des Moines River
A State of the north-central United States, separated on the east by the Mississippi River from Wisconsin and Illinois. Minn...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Des Moines River (United States) 82 28 2 2 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.