Most common frequency adverbs: Always, usually, ofgten, sometimes, never.

Adverb is a word used to describe or MODIFY verbs (actions), adjectives and other adverbs.
There are 5 different kinds of adverbs:

1. Manner
2. Frequency
3. Degree
4. Time
5. Place

Frequency adverbs describe or modify answering the question word How often?

Frequency Adverbs:

100% always
usually
often
50% (+/-) sometimes
seldom
rarely
0% never