This document discusses frequency adverbs and how they are used to describe how often an action occurs. It provides examples of common frequency adverbs like always, usually, often, sometimes, almost never, hardly ever, and never. It explains that frequency adverbs are placed before the main verb in present simple sentences. Other expressions of frequency include "how often" questions. Examples are given of using frequency adverbs with expressions of time like once, twice, daily, weekly, and yearly.