How long to breathe (the equivalent) of all of the atmosphere?

I have done some rough calculations of how long it might take humanity: approx 80,000 years (that’s taking Earth’s population as 7.5 billion, 11,000 litres a day of breathing per person, the weight of 1 litre of air at sea level at 1.225 grams, and the total weight of the atmosphere at 5140 trillion tonnes)

Please let me know if my calculations are massively out!

My question now is – how long would it take all animal species combined to breathe the equivalent sum total weight of the atmosphere…. and how long would it take all life combined??