umm ur calculations might be a bit off. Since there is 365 days in a year it's impossible to be 2158 in about 2½ years.
Maybe I should try.
2 years= 2x365= 730 days
6 months= 6x30= 180 days (I know that this is not 100% accurate but it's close enough)
22 days= 22x1= 22 days
730+180+22= 932 days
250,000/932~ 268 post per day
I don't know if that is right, my head hurts so much that I don't want to check if I missed anything.