Frequency adverbs

Always, usually, often, sometimes, rarely, never, etc

Time prepositions

Once                             
Twice                            a day, a week,

Three times                    a month, a year

Four times                     
Etc......

Every day /morning / afternoon / evening

At weekends

On Mondays / Tuesdays

During the day

In the evenings, afternoons, etc

How often.........?