CONFIG_CPU_CLOCK is not available for thedefaultarchitecture x86.
Result is shown for architecture h8300
default or selected kernelversion does not have config value CONFIG_CPU_CLOCK.
Result is shown for kernelversion 6.2.5

CPU Clock Frequency (/1KHz)

configname: CONFIG_CPU_CLOCK

Linux Kernel Configuration
└─>Processor type and features
└─>CPU Clock Frequency (/1KHz)
In linux kernel since version 2.6.12  
CPU Clock Frequency divide to 1000