Only once did he look up. He had just written the sentence: "The arms,artillery and public property will be given over to the Union army."

VOA: special.2009.12.24

For example, the stock market crash of 1929 is repeatedly re-expected even though it only happened once; it's just prominent in our thinking.

929年股市崩盘,就被反复提及,尽管这只发生过一次,但是人们对它影响深刻

耶鲁公开课 - 金融市场课程节选