On TripAdvisor’s website for hotels, it gets 15 million clicks on hotels each day, and there are 1 million distinct hotels. We would like to display urgency messages when a user clicks on a hotel. If we get more than 10 user clicks for the specific hotel in the past 10 minutes, display a message to the user saying 10 other users have looked at this hotel in the past 10 minutes (trying to let the users feel the sense or urgentness). If no more than 10 users in the past 10 minutes, look at the past hour and display message if there are more than 10 clicks in the past hour. If no more than 10 user clicks in the past hour, look at the past 24 hours, and display message if there are more than 10 user clicks. Otherwise, display no message. How would you implement this feature?