一刻

一刻	yī kè	a quarter of an hour; 15 minutes / a moment; an instant
一	yī	one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit
刻	kè	quarter (hour) / moment / to carve / to engrave / to cut / oppressive / classifier for short time intervals