title: counting number of occurrences in nested list for duplicates
body: <p>I have this list in python below which is a list of nested lists and want to count number of occurrences of a timestamp and print the count for each timestamp . How do I do that in python?</p>
  
  <pre><code>message= [['619833', 'Mon Jun  3 15:49:22 2019'], ['568391', 'Mon Jun  3 15:49:22 2019'], ['578934', 'Sat Jun  1 18:34:12 2019'], ['699425', 'Sat Jun  1 18:34:12 2019'], ['969231', 'Wed May 29 16:18:07 2019']]
  </code></pre>
  
  <p>Expected results: </p>
  
  <pre><code>['Mon Jun  3 15:49:22 2019', 2 ]
  ['Sat Jun  1 18:34:12 2019', 2 ]
  </code></pre>
  
  <p>Where 2 is the count.</p>