ἐπειδή (epeide)
ἐπειδή is an Ancient Greek form of ἐπεί, meaning “after, when, since, because”. It is the conjunction.
Found 3,833 times in the Ancient Greek texts on Socratos.
Where it is used
Apollonius Rhodius, Argonautica 2.714: αὐτὰρ ἐπειδὴ τόνγε χορείῃ μέλψαν ἀοιδῇ,
Thucydides, History of the Peloponnesian War 1.13.5: … ισγόντων, χρήμασί τε δυνατοὶ ἦσαν, ὡς καὶ τοῖς παλαιοῖς ποιηταῖς δεδήλωται· ἀφνειὸν γὰρ ἐπωνόμασαν τὸ χωρίον. ἐπειδή τε οἱ Ἕλληνες μᾶλλον ἔπλῳζον, τὰς ναῦς κτησάμενοι τὸ λῃστικὸν καθῄρουν, καὶ ἐμπόριον παρέχοντες ἀμφότερα δυνα …
Diogenes Laertius, Vitae philosophorum 5.1.3: Ἐπειδὴ δὲ πλείους ἐγένοντο ἤδη, καὶ ἐκάθισεν εἰπών· αἰσχρὸν σιωπᾶν, Ξενοκράτην δʼ ἐᾶν λέγειν. καὶ πρὸς θέσιν συνεγύμ …
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.