δυοῖν (dyoin)
δυοῖν is an Ancient Greek form of δύο, meaning “two”. It is the numeral.
Found 610 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.20.3: … ἄλλοι Ἕλληνες οὐκ ὀρθῶς οἴονται, ὥσπερ τούς τε Λακεδαιμονίων βασιλέας μὴ μιᾷ ψήφῳ προστίθεσθαι ἑκάτερον, ἀλλὰ δυοῖν, καὶ τὸν Πιτανάτην λόχον αὐτοῖς εἶναι, ὃς οὐδ’ ἐγένετο πώποτε. οὕτως ἀταλαίπωρος τοῖς πολλοῖς ἡ ζήτησις τῆς ἀ …
All forms of δύο (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.