Adverbs of frequency are used to say how often (or frequently) we do something. In English, the adverbs of frequency are:
Always
Usually
Frequently
Often
Sometimes
Occasionally
Rarely
Seldom
Hardly ever
Never
You probably remember the vocabulary, but can you remember where we must place them in the sentence?
Frequency adverbs show how often something happens. They usually come before the main verb in a sentence: "I sometimes cook Italian food."