Statistics for occurrence #1 of “Tigris” in book 8, chapter 25 of Polybius, Histories:

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In the reign of Xerxes, prince of the city of Armosata, situated on the "Fair Plain," between the Tigris and Euphrates, King Antiochus encamped under its walls and prepared to attack it. When he saw the king's forces, Xerxes at first conveyed himself away; but feeling afterwards that, if his palace were...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Tigris 94 24 0 0 0 user votes
Tigris (Missouri, 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.