This document discusses adverbs of frequency and how they are used to indicate how often an activity occurs. It provides a list of common adverbs of frequency from most frequent to least frequent. It explains that adverbs of frequency are usually placed between the subject and verb of a sentence, except after forms of "to be" where they follow the verb. It also discusses using adverbs of frequency with auxiliary verbs and in questions/negative sentences. Specific examples are provided to illustrate the different rules.