Deciding what frequency within the CPUfreq policy should be used is achieved using "cpufreq governors".
Inside the CPUFreq we can find:
# ls /sys/devices/system/cpu/cpu1/cpufreq/ affected_cpus related_cpus scaling_max_freq bios_limit scaling_available_frequencies scaling_min_freq cpuinfo_cur_freq scaling_available_governors scaling_setspeed cpuinfo_max_freq scaling_cur_freq stats cpuinfo_min_freq scaling_driver cpuinfo_transition_latency scaling_governor
scaling_available_frequencies
# cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_available_frequencies 2400000 2133000 1867000 1600000