How often: always, usually, often, sometimes, rarely, never
Subject + frequency adverb + verb; Subject + be + frequency adverb
Subject + don't/doesn't + frequency adverb + verb
How often do you...? Do you ever...?
💡 Never, rarely, seldom are already negative; don't use with 'not'.
✓She always arrives on time.
✗She arrives always on time.
Frequency adverb before main verb.
✓He is usually tired.
✗He usually is tired.
Frequency adverb after 'be'.
✓I have never been to Japan.
✗I never have been to Japan.
Between auxiliary and main verb.