The document discusses frequency adverbs in English and their usage. It provides examples of common frequency adverbs on a scale from 100% (always) to 0% (never). It explains that adverbs of frequency are placed before the main verb, except with the verb "to be" when they follow it. Examples are given of sentences using frequency adverbs like "always", "never", "sometimes". Further expressions of frequency are discussed that occur at the end of sentences, such as "once a week/month/year", "twice a week", etc.