屡屡 (lǚ lǚ): again and again; repeatedly

This student has been late again and again; the teacher has reminded him many times, but he still hasn't changed.

Recently the subway has broken down again and again, and many passengers have had to switch to taking the bus to work.

He made mistakes again and again during the match and ultimately lost this important final.

The waiters at this restaurant repeatedly forgot customers' orders, leading to many complaints.

Although the doctor warned him again and again that smoking is harmful to health, he still couldn't quit this bad habit.