title: Removing content of a column based on number of occurences
body: <p>I have a file (; seperated) with data like this<br><br></p>
  
  <pre><code>111111121;000-000.1;000-000.2
  111111211;000-000.1;000-000.2
  111112111;000-000.1;000-000.2
  111121111;000-000.1;000-000.2
  111211111;000-000.1;000-000.2
  112111111;000-000.1;000-000.2
  121111112;000-000.2;020-000.8
  121111121;000-000.2;020-000.8
  121111211;000-000.2;020-000.8
  121113111;000-000.3;000-200.2
  211111121;000-000.1;000-000.2
  </code></pre>
  
  <p>I would like to remove any $3 that has less than 3 occurences, so the outcome would be like<br><br></p>
  
  <pre><code>111111121;000-000.1;000-000.2
  111111211;000-000.1;000-000.2
  111112111;000-000.1;000-000.2
  111121111;000-000.1;000-000.2
  111211111;000-000.1;000-000.2
  112111111;000-000.1;000-000.2
  121111112;000-000.2;020-000.8
  121111121;000-000.2;020-000.8
  121111211;000-000.2;020-000.8
  121113111;000-000.3
  211111121;000-000.1;000-000.2
  </code></pre>
  
  <p>That is, only $3 got deleted, as it had only a single occurence <br></p>
  
  <p>Sadly I am not really sure if (thus how) this could be done relatively easily (as doing the =COUNT.IF matching, and manuel delete in Excel feels quite embarrassing)</p>