If it repeats occasionally, with no exact set pattern, then it might be the wind blowing a loose flap against a pole.
She read out the names and addresses very slowly, occasionally repeating.
She had to repeat occasionally, but he surprised himself.
He rambled on, occasionally repeating the same phrase several times.
Ms. Donohue occasionally repeated points.
On the other hand it was said the film would occasionally repeat itself.
In a testament to her enduring intellectual fitness, she cautioned out loud how she might occasionally repeat herself during the conversation.
"Anytime" became a moody, introspective piece, with the chorus of the tune repeated occasionally: "Do I ever cross your mind?"
Ms. Osserman occasionally repeated some of her effects.
He was an attentive listener, occasionally repeating cogent points, or asking her to elaborate others.