title: Most frequent occurrence Realm
body: <p>I have an object with a column <code>supervisor</code>. In <code>supervisor</code> there are the following values:</p>
  
  <ul>
  <li>John</li>
  <li>Mary</li>
  <li>Phil</li>
  <li>John</li>
  </ul>
  
  <p>How can I return John?</p>
  
  <pre><code>class Person: Object {
      dynamic var name: String = String()
  </code></pre>