G.A. Poole sent me an email pointing me to this piece about the history behind the Bears and the Giants.
Over their eight decades together, the Giants trail the Bears in their regular-season series, 26-17-2, but in the postseason the Giants have played the Bears eight times, more often than any other postseason opponent. In six N.F.L. championship games, the Bears lead, 4-2. In two divisional playoffs, they split 1-1.