CPU frequency transition statistics

modulename: cpufreq_stats.ko

configname: CONFIG_CPU_FREQ_STAT

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>CPU frequency transition statistics
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Export CPU frequency statistics information through sysfs.

If in doubt, say N.

source code:
drivers/cpufreq/cpufreq_stats.c
depends
CONFIG_CPU_FREQ