O brother, it is a three-month-long meeting! It is a three-month-long meeting.

This couplet highlights the rarity and preciousness of a meeting. It tells us that these encounters happen only every three months. The repetition of 'three months' emphasizes the long wait between each visit, suggesting that such meetings are not frequent but are perhaps deeply anticipated and cherished. It evokes a feeling of longing or the special significance of these periodic connections, making each one a valuable moment. The speaker addresses someone affectionately with 'oh brother', adding a personal touch to this sentiment.