Get a random frequency of CPU.

        :return: Frequency of CPU.

        :Example:
            4.0 GHz.

def cpu_frequency(self) -> str:
        """Get a random frequency of CPU.

        :return: Frequency of CPU.

        :Example:
            4.0 GHz.
        """
        return '{}GHz'.format(
            self.random.uniform(
                a=1.5,
                b=4.3,
                precision=1,
            ),
        )