Yeah, it was this stretch
Dec 9 - Lost to Villa 1-0
Dec 17 - Beat Brighton 2-0
Dec 23 - Drew with Liverpool 1-1
Dec 28 - Lost to West Ham 2-0
Dec 31- Lost to Fulham 2-1
From January to season end they won 16, lost 1 and drew 1. The draw is neutral as it was to City.
So Arsenal had zero room for error if they couldn't beat City. They had to win all 17 non City games to win the league