Here's why:

* Frequency refers to the number of vibrations or cycles an object completes per second.

* High frequency means the object vibrates many times per second.

* Low frequency means the object vibrates fewer times per second.

Think of it like this:

* A high-pitched sound, like a whistle, is caused by vibrations with a high frequency.

* A low-pitched sound, like a bass drum, is caused by vibrations with a low frequency.

So, the faster the object vibrates, the higher its frequency.