timer4 accuracy

S in development environment ´╝ÜWindows7
HARD :(Taiyo Yuden)EBSHSN Series Evaluation Board : Central / Peripherals
CPU :(Nordic) nRF52832 / ARMR Cortex?-M4F 32 bit processor 28-pin Land Grid Array / 15GPIOs / SWD
Soft Ver:nRF5_SDK_15.2.0_9412b96
clock :RC transmission setting

I switched the terminal output to Low / Hi at 1-second intervals with two peripheral devices and checked whether the switching timing is synchronized,
but did not synchronize, please tell me how to synchronize

Thank you very much.