English grammer

a. My father usually goes for a walk in the park.

b. We have music classes twice a week.

c. Have you ever heard such a story before?

d. People rarely listen to the radio nowadays.

e. Never say die really means always hope for the best.

f. You must exercise daily to keep fit, says our PT teacher.

In a, usually is the adverb of frequency.

In b, twice is the adverb of frequency.

In c, ever and before are adverbs of frequency.

In d, rarely and nowadays are adverb of frequency.

In e, never and always are adverbs of frequency.

In f, daily is the adverb of frequency.