If you have used Twitter search before, you may notice that you can only go back a certain amount of time and/or number of tweets for a given search. In fact, if you read the Twitter search documentation, you'll note that the folks from Twitter say, "We also restrict the size of the search index by placing a date limit on the updates we allow you to search. This limit is currently around a month but is dynamic and subject to shrink as the number of tweets per day continues to grow."

The Archivist will display a chart that shows the number of tweets per day for a given search, so that you can quickly assess traffic for a given search. For more comprehensive data analysis, The Archivist lets you export Tweets to Excel. It also natively saves tweets in an XML format, which could also be parsed for deeper data analysis.