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。

《牛津词典》

Seizures can also vary in frequency, from less than one per year to several per day.

癫痫发作的频率也可存在差异，从每年发作少于一次，到每天发作几次不等。

youdao

The birds were quiet, too, the drops increasing in frequency, so it must be raining above.

鸟儿也安静下来了。滴水逐渐变得频繁起来，所以森林上空一定在下雨。

youdao

The strikes have increased in frequency in recent months.

VOA: standard.2009.05.12

So, let's say they were expecting to see one certain frequency or one line in the spectrum at this point here.

比如说他们预计会看到某个特定的频率,或者在这里看到一个谱线。

麻省理工公开课 - 化学原理课程节选

So, if something cycles through five wavelengths in a single second, we would just say that the frequency of that wave is five per second.

如果一个东西在一秒,内经历了五个波长，我们就说这个波的,频率是每秒5次。

麻省理工公开课 - 化学原理课程节选

The inquiry heard that the increase in frequency meant there was an increase in risk.

BBC: Murdered RUC men Breen and Buchanan warned about risk

But 84 percent thought stress testing should be increased in frequency to at least every six months.

FORBES: Finance Execs Don't Trust Stress Testing But Want More of It

Alexander noted that cyberattacks have been increasing in frequency for some time now.

CENTERFORSECURITYPOLICY: Center for Security Policy | Ramping Up on Cyberwarfare Could Mean Reexamining Rules of War