Install xfce4-cpufreq-plugin by entering the following commands in the terminal:
sudo apt update sudo apt install xfce4-cpufreq-plugin
Description:
cpufreq information plugin for the Xfce4 panel
This plugin displays the current frequency of the CPU, in GHz or MHz as necessary. It also displays the frequency relative to the maximum CPU frequency as an accordingly colored progress bar.
Version: 1.1.3-1
Section: universe/x11