晷

寸晷

cùn guǐ

see 寸陰|寸阴[cun4 yin1]

日晷

rì guǐ

sundial

日无暇晷

rì wú xiá guǐ

no time to spare (idiom)

焚膏继晷

fén gāo jì guǐ

to burn the midnight oil (idiom); to work continuously night and day