Tempo - Frequência

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

acontecendo o tempo todo

at any given hour, particularly a time that is late

constantemente

used for referring to a frequent change from something to another

de um dia para outro

nearly all the time

a maior parte do tempo

in a way that is not continuous or regular

algo que acontece irregularmente

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

algo que acontece muito raramente

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

algo que acontece apenas uma vez

in a single action, without delay or hesitation

em uma única ação

in a manner that is consistent

todas as horas da semana

on multiple occasions

repetidamente

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

na hora