The distance between two repeating points of a wave is called the wavelength.

Here's a breakdown:

* Wavelength is the distance between two identical points on consecutive waves. It's often measured between the crests (highest points) or troughs (lowest points) of the wave.

* Frequency is the number of waves that pass a given point in one second.

* Speed of the wave is the distance the wave travels in a given time.

The relationship between wavelength, frequency, and speed is:

Speed = Wavelength x Frequency

Let me know if you'd like to explore any of these concepts in more detail!