시간 - 빈도

in way that continues to happen all the time with no stop

항상 일어나는

at any given hour, particularly a time that is late

끊임없이

used for referring to a frequent change from something to another

어느 날부터 다른 날까지

nearly all the time

대부분의 경우

in a way that is not continuous or regular

불규칙하게 일어나는 일

used for saying that something can only happen on very rare occasions

아주 드물게 일어나는 일

used for referring to a very special opportunity that most likely will not be offered more than once to someone

한 번만 일어나는 일

in a single action, without delay or hesitation

한 번의 행동으로

in a manner that is consistent

일주일 내내

on multiple occasions

자꾸

used to describe something that happens at fixed intervals or follows a consistent pattern without fail

정시에