How to convert the wave height versus time graph into a frequency versus wave height graph?

How to convert the wave height versus time graph into a frequency versus wave height graph, we have obtained a series of wave height graphs in the experiment, and use excel to perform our data, like the following image below.

[Tamir Suliman]

• Angular Frequency = ω = 2π/T (units of 1/time)

if you have the time series and data its easy to plot it