When was the last time okonkwo remembers visiting Mbanta?

Okonkwo last remembers visiting Mbanta during his exile after accidentally killing a clansman, which is considered a female crime in his society. This visit is significant as it marks a period of reflection and connection with his mother’s family. He stayed in Mbanta for seven years before returning to his original village of Umuofia. This time in Mbanta deeply impacts his outlook and sense of identity.