How accurate and up-to-date is the information provided by Google Trends?

2. How accurate and up-to-date is the information provided by Google Trends?

The data Trends produces may contain inaccuracies for a number of reasons, including data-sampling issues and a variety of approximations that are used to compute results. We hope you find this service interesting and entertaining, but you probably wouldn’t want to write your Ph.D. dissertation based on the information provided by Trends.
The information provided by Trends is updated daily, and Hot Searches is updated hourly.

3. When will Google Trends be available for my country or language?

Currently, Google Trends is only available in English and in Chinese. Hot Searches is only available in English, but both Singapore and India show information specific to their regions. We hope to roll out Google Trends in other regions and languages in the future