Usually repetition is used in oral cases to make emphasis in what the speaker is willing to communicate in his speech and also to make the oral speech more enjoyable with rhythm caused in words.
It refers to saying something twice but in different context.
<em>Example:</em>
<em>"My conscience hath a thousand several </em><em>tongues,</em>
<em>And every </em><em>tongue</em><em> brings in a several </em><em>tale,</em>
<em>And every </em><em>tale</em><em> condemns me for a villain."</em>
<em>--Shakespeare, Richard III</em>
The given poem above is actually written by Walt Whitman which is entitled "<span>In Cabin'd Ships at Sea". In this poem, we can notice the structure that the author used here which is the "long-line structure", and the reason why he chose this structure so that he can include a list. Hope this helps.</span>
