Time-to-event data, also known as survival data or time-to-failure data, is commonly encountered in biomedical research when studying the time it takes for an event of interest to occur. This event could be a patient's death, disease recurrence, the onset of a specific symptom, or any other event with a well-defined start and endpoint. Analyzing time-to-event data is crucial in understanding the progression and outcomes of diseases, treatment effectiveness, and more.