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<!doctype html>
<html lang="ja">
  <head>
    <meta charset="utf-8">
    <style>
    table {
      border-collapse: collapse;
      margin: 1em;
    }
    td {
      width: 1.5em;
      height: 1.5em;
      text-align: center;
      color: #555;
      border: 1px solid #aaa;
    }
    </style>
    <title>freq</title>
  </head>
  <body>
    <h1>freq</h1>
    <script src="script.js"></script>
  </body>
</html>