Frequency adverbs answer the question: How often?

Here we will see: Always, Usually, Sometimes, Hardly Ever, Never.
Everyday Activities.

Answer the question: how often do you...? For example:
how often do you feed the dog?   - I never clean the windows  / - I often clean the windows

Remember that we put the frequency adverbs after normal verbs.
You can use this list of adverbs: Always - usually - often - sometimes - occasionally - seldom - rarely - never