recurring

"When faced with a difficult math problem, I often recur to my older sister for help. "

"The theme of the prodigal son recurs later in the third act."

"Due to a programming error, the cleaning robot recurringly bumped into the same wall, getting stuck in an infinite loop. "

"The recurring of her headaches made it difficult to focus on her studies. "

"He has recurring asthma attacks."

"Every rational number can be written as either a terminating decimal or a recurring decimal."