定期

定期	dìng qī	at set dates / at regular intervals / periodic / limited to a fixed period of time / fixed term
定	dìng	to fix; to set; to make definite / to subscribe to (a newspaper etc); to book (tickets etc); to order (goods etc) / to congeal; to coagulate / (literary) definitely
期	qī	variant of 期 / period / cycle
期	qī	a period of time / phase / stage / classifier for issues of a periodical, courses of study / time / term / period / to hope / Taiwan pr. [qi2]