计时

计时	jì shí	to measure time / to time / to reckon by time
计	Jì	surname Ji
计	jì	to calculate / to compute / to count / to regard as important / to plan / ruse / meter / gauge
时	shí	old variant of 时
时	Shí	surname Shi
时	shí	(bound form) time; hour; period; season / (after a numeral) o'clock; hour(s) / (after a verb phrase or clause) when; while