Prevalence is a noun that refers to how common something is, how often it happens.

" prevalence" 是一个名词，指某事有多常见，发生的率有多高。

So how often do you listen to music?

听乐的率是怎样的？

Don't be silly. How often do you get to san francisco?

别傻了 多难得来一趟旧金山啊？

She has people fill out surveys about how often they procrastinate.

她让人们填写了关於 他们拖延率的调查问卷。

Consider how often you make this kind of judgment every day.

想想每天有多少次做出种判断。

However, you'd be surprised how often this is poorly executed.

不过，绝对想不到执行起来会有多么困难。

So, like, how often do you study a week do you think?

每周学习多少时间？

You know how often you have to change the operating system on your phone!

得多繁更换一次手机上的操作系统！

So, how often do limited strikes even work?

那么，什么率的精确打击才能产生作用？

How often had they complained how much Harry cost them to keep?

他们不是经常抱怨收养哈利要花费许多钱吗？

Generally speaking, frequency means how often something repeats.

一般来说，率是指某件事重复的次数。

But the strength of these cravings is set by how often you give into them.

但些渴望的强度取决于满足它们的率。

Let's see. How often would you like to receive statement?

让我们看看，希望多久收到结算清单？

You don't even realize how often that us left-handed people have to overcome or adapt!

甚至没有意识到我们左撇子需要克服或适应多少次！

And number four, just think about how often we've been boxed in by false choices.

第四，想想我们多繁地被误导选择所困扰。

I looked out into the valley and asked how often they attacked.

我向山谷望去，问他们多久攻击一次。

With such a busy schedule, how often do you actually get to relax?

在如此繁忙的日程中，多久能真正放松一次？

So how often are you using this?

多久用一次？

Neglecting Sleep How often do you get a good night's sleep?

4，忽视睡眠多久会睡个好觉？

How often do you turn off your phone?

多久会关掉手机？