With $11 billion in total lifetime revenue, the Call of Duty franchise is one of the biggest in all of gaming. But how many copies of the series have been sold to date? Activision clued us in today, announcing via a new infographic that, since the series debuted over a decade ago, it has sold 175 million Call of Duty games.That comes out to around one copy sold every two minutes, Activision said.By comparison, Take-Two's Grand Theft Auto series has sold more than 185 million copies.Other franchises to have sold more than 100 million units include household names such as LEGO, Mario, Pokemon, Need for Speed, Final Fantasy, and FIFA.Meanwhile, Microsoft has sold 60 million Halo games while Konami has shifted 33 million Metal Gear Solid titles, according to each publisher's latest count.Going back to the Call of Duty infographic, over 100 billion multiplayer matches have been played so far, while players have chucked more than 300 billion grenades.