Her name is spelled as 9-1-1.

I called 9-1-1 when I saw the accident.

He 9-1-1ed the emergency services when he saw the accident.

There were multiple 9-1-1s reported last night.

The 9/11 attacks were a series of coordinated terrorist attacks by the Islamic extremist group al-Qaeda against the United States on the morning of September 11, 2001.

The terrorist attack on September 11, 2001, also known as 9/11, was a tragic event that changed the world.

The 9/11s were a series of terrorist attacks that occurred on September 11, 2001.

9/10ths of the students passed the exam.