For anyone following the Search Zeitgeist, this is a sad day. Google has just changed updates on Google Trends from hourly to daily.
The change is so new, Google hasn't even updated its FAQ on Google Trends:
How does Hot Trends work?
Hot Trends reflects what people are searching for on Google today. Rather than showing the most popular searches overall, which would always be generic terms like "weather," Hot Trends highlights searches that have sudden surges in popularity. Our algorithm analyzes millions of web searches performed on Google and displays those searches that deviate the most from their historic traffic pattern. The algorithm also filters out spam and removes inappropriate material.
For each search, Hot Trends shows related searches, a search-volume graph, and the top cities. We also display news, blog, and web results to help give context about why a search may be appearing on the Hot Trends list today. Hot Trends is updated hourly. You can also choose a date in the past to see what the top Hot Trends for that date were.
It's a shame Google has made this decision. The company shares very little data about searches done on the search engine. Google Trends was the best way to keep abreast of what captured people's imagination in more-or-less real-time.
We hope Google didn't make this change due to our report on glitches in Google Trends or the appearance of spam more frequently in the Google Trends results.
We also hope Google returns Google Trends to an hourly basis before the service comes out of beta.
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