In a blog post on the Inside Search Blog, Gavri Smith a Google software engineer announced "You can now "Subscribe" to any search topic, Hot Searches for any country, or any U.S. monthly Top Chart." Google Trends has been useful to gauge interest in terms and trends that people are searching for online.
This morning, the avalanche on Mount Everest, Earthquake in Mexico are hot searches along with the movie "Transendence" , along with Hot Searches, you can look at Top Charts or explore the trend for your own search terms.
The ability to get the results of this powerful tool from Google into your inbox is huge. To sign up go to https://www.google.com/trends/ and you will see the link to sign-up or subscribe to Google Trends Alerts.