Acts 18:11
So, Paul lived there [in Corinth] for eighteen months, teaching God's message among the inhabitants [of the city].
Acts 14:3
Paul and Barnabas remained there a long time and spoke [the message] boldly for [or, in the power of] the Lord who gave His approval to the message of unearned favor by allowing [miraculous] signs and wonders to be performed by them.
Acts 19:10
This continued for two years so that all the Jews and Greeks [i.e., Gentiles] who lived in [the province of] Asia heard the message of the Lord.
Acts 20:31
So, be very watchful, and remember that for three years I never stopped warning every one of you [about such matters] both night and day with tears [in my eyes].