What part of speech usually answers how often?

The part of speech that usually answers "how often" is an adverb of frequency.

Here's why:

* Adverbs of frequency describe how often something happens. They are usually placed before the main verb (e.g., "I *always* go to the park") or after the auxiliary verb (e.g., "He *has never* seen snow").

Examples of adverbs of frequency:

* Always

* Never

* Often

* Rarely

* Sometimes

* Usually

* Frequently

* Occasionally

Examples:

* How often do you exercise? Usually twice a week.

* I never eat breakfast.

* They often go to the beach in the summer.