title: How to count number of timestamp entries per day
body: <p>what formula could I use to show the average number of timestamp entries per day? I use a Google Form that enters data into a Google Sheet. I want to eventually create Charts showing the average number of timestamps per day/week/month, with trends. (For example, we receive 5 telephone calls per day on average). I'm thinking I first need a formula to count the number of timestamp entries per day, then I can use another formula to find the average per day/week/month, etc.</p>
  
  <p>Below is an example of the timestamp entries all in Column A now showing only the date as I removed the "time" using =ArrayFormula(Responses!A:A)</p>
  
  <pre><code>8/8/2016
  8/8/2016
  8/9/2016
  8/9/2016
  8/9/2016
  8/9/2016
  8/9/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/10/2016
  8/11/2016
  8/11/2016
  </code></pre>