I have a column newdate. I want to create a mastercalendar and store the frequency of dates (if a date occurs 3 times in new date column its frequency should be 3, if there is no entry for a particular day its frequency should be zero). The purpose of doing this is i want to make bar chart and line chart of number of tweets per day, per month etc. So i want to store data in mastercalendar. The bar should show zero for a particular day if there was no date entry in new date column on that day and 3 if the date is three times in new date column.