the 1st was from 2008 to 2012,
the 2nd was 2013 to 2020,
the 3rd would be from 2020 till the end.
The first two harvests were the harvesters being saved and raised up for the billion soul harvest that would begin to come in, in 2020 and beyond. The church must build a great network of harvesters and a vast infrastructure of the Spirit to be able to handle the influx and weight of the masses that will flow into it.