Parallel
Acts 18:11
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ἐκάθισέ τε ἐνιαυτὸν καὶ μῆνας ἓξ διδάσκων ἐν αὐτοῖς τὸν λόγον τοῦ Θεοῦ.
So Paul stayed for a year and a half, teaching the word of God among the Corinthians.