The CpuFreq Plugin shows in the Xfce Panel the following, chooseable informations:
In a seperate dialog it provides you following informations of all available informations:
Using the plugin is quite simple. You select the cpu which you want to monitor in the Xfce Panel. Next thing you could change is the timeout interval how often the informations have to be updated. The default value is 1,0 s.
You can also specify which informations should be displayed in the panel.
Bugs should be reported to the Xfce bug tracking system.
The normal (and best) way to get this plugin is to use the package manager or port system of your operating system.
If it isn't available there, or if you want a different version, you can download it in source form from http://archive.xfce.org/src/panel-plugins/xfce4-cpufreq-plugin/.