is implemented in a Reactive Programming (RP) style.</p>
            <ul>
                <li>(The current input ~&gt; usage statistics) + UI input information ~&gt; visual data ~&gt; draw visual elements on top of the input</li>
            </ul>
        </li>
        <li><p>As the frequency of a word or phrase increases, its background color varies from a translucent yellow to a transparent red. In this way, if a usage appears again and again in an essay, its highlight will eventually become unnoticeable.