A.T. Robertson Commentary Acts 18:11

"And he dwelt [there] a year and six months, teaching the word of God among them." — Acts 18:11 (ASV)

A year and six months (ενιαυτον κα μηνας εξ). Accusative of extent of time. How much time before this incident he had been there we do not know. He was in Corinth probably a couple of years in all. His work extended beyond the city (2 Corinthians 11:10) and there was a church in Cenchreae (Romans 16:1).