Google trends data is accurate, but it doesn’t provide absolute search volume. Since Google performs billions of searches daily, including every single search in its data set would take a long time. So, Google Trends uses a sample of searches. Google notes that its Trends data “is not scientific and might not be a perfect mirror of search activity.” Some searches will report with a search volume of zero, but that may mean that the search volume was too low for Google to consider it significant; the actual volume may be higher than zero—but still low.