Bear in mind that some of these time expressions could be used with either tense, depending on context, but because these ones are less specific and somewhat vague you will often find them used with the Imperfect tense.
- a menudooften
- a vecessometimes
- cada diaevery day
- con frequenciafrequently
- de vez en cuandofrom time to time
- en aquella epocaat that time
- muchas vecesmany times
- por un ratofor a while
- siemprealways
- todo las diasevery day
- todo el tiempoall the time
- varias vecesvarious times
- los luneson Mondays
- mientraswhile
- general -menteusually
- frecuente -mentefrequently
- muchoa lot
- algunas vecesat times
- todas las semanasevery week