Interesting Google Fact

Did you know that 20% of the queries Google receives each day are ones that have not been seen in the last 90 days, if at all?
What does that mean?
By my back of the napkin calculations, based on comScore monthly search volume estimates for Google.com (not entire Google network, just Google.com) of around 8 billion searches (around 266,666,667 searches a day) that means there is over:
53 million new search terms entered in to Google every single day!