HSK 6
频率
pínlǜ名
frequency
机器运行的频率可以调整。
Jī qì yùn xíng de pín lǜ kě yǐ tiáo zhěng.
The operating frequency of the machine can be adjusted.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 6.