I will use a top-down TAM (total Addressable market) approach.   The total population is 7.5 billion. China does not use google, and 50% of Russians don't use google as a primary search; it leaves us with 6 billion. Only half population is connected to the Internet, the remaining 3 billion. Google share 75% market with other search engines, remain 2.25 billion Now I will break down 2.25 billion with user frequency, Active, aggressive, or passive. Passive searchers don't use google daily, like older adults, kids, and the rural population, who assume they are 50% of remain 1.1 billion. Active users search once a day, assume it's 25% of the population, remain 550 million. Aggressive users are super active and search 7-8 times daily; 25% of the population remains 550 million. Total searches per day = 550*1 + 550*6 = 3.8 billion per day = 3.8 billion / 24 hrs/ 60 min/ 60 sec = 44,000 searches per second