dìng​shí​zhōng

alarm clock

定时钟 (定時鐘) dìng​shí​zhōng
alarm clock noun
a clock designed to alert or wake a person at a specific time
timer noun
a device used to measure or control the timing of an event or process

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
0.007 per million

Sources

Definitions
CC-CEDICT