In his NTSB briefing held Feb.16, Chealander said:
"The first motion of the airplane when the upset started, was a pitch up of 31 degrees. I'm giving you the maximum numbers now, not giving you each of the snapshots - we have snapshots of the flight data recorder every 5 seconds - and what I'm giving you are the maximums that it attained."
Surely he wasn't implying the DFDR was recording attitude parameters on a 5 second sampling rate.
Did he mean that the pitch & roll numbers he stated (up 31-degrees, down 45-degrees, left 46-degrees, right 105-degrees) occurred 5 seconds apart?
36 minute video of the NTSB briefing held by Chealander Feb.16 can be
viewed here.