CONFIG_KVM_GUEST_TIMER_FREQ is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_KVM_GUEST_TIMER_FREQ.
Result is shown for kernelversion 6.9.9

Count/Compare Timer Frequency (MHz)

configname: CONFIG_KVM_GUEST_TIMER_FREQ

Linux Kernel Configuration
└─>Kernel type
└─>Count/Compare Timer Frequency (MHz)
In linux kernel since version 3.16 (release Date: 2014-08-03)  
Set this to non-zero if building a guest kernel for KVM to skip RTC
emulation when determining guest CPU Frequency. Instead, the guest's
timer frequency is specified directly.