This paper is intended to analyze differences in the semantic distribution of quiet and silent through the largest corpus available in the world, Bank of English, and to show that unmarked quiet is used in many different situations, while marked silent is preferred to emphasize the situations in which actions that are usually expected to be performed with some noise are done without any noise, in which actions that are expected to be performed with or without noise are contrasted, and in which speakers or writers feel anxiety or fear about quietness, or subjects' strong will is implied.