CONFIG_KVM_HOST_FREQ is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_KVM_HOST_FREQ.
Result is shown for kernelversion 6.5.1

KVM Host Processor Frequency (MHz)


Linux Kernel Configuration
└─>Kernel type
└─>KVM Host Processor Frequency (MHz)
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Select this option if building a guest kernel for KVM to skip
RTC emulation when determining guest CPU Frequency. Instead, the guest
processor frequency is automatically derived from the host frequency.