accident frequency rate

• 事故发生率

accident frequency rate的用法和样例：

例句

1. Fatal road accidents have decreased in frequency over recent years.
   近年来致命交通事故发生率已经下降。
2. I am of the opinion that a better road will decrease the accident rate.
   我的意见是，道路好上点可以降低事故发生率。