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Where Trends data comes from

Google Trends analyzes a percentage of Google web searches to figure out how many searches were done over a certain period of time.

For example, if you search for tea in Scotland in March of 2007, Trends analyzes a percentage of all searches for tea within the same time and location parameters.

Data that is excluded

  • Searches made by very few people: Trends only analyzes data for popular terms, so search terms with low volume appear as 0.
  • Duplicate searches: Trends eliminates repeated searches from the same person over a short period of time.
  • Special characters: Trends filters out queries with apostrophes and other special characters.
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