For this season (mins played, goals scored while on the pitch, goals scored while off):
PL
Chelsea 4-0 (86 mins, 4 goals on, 0 goals off).
Wolves 1-1 (81 mins, 1 goal on, 0 goals off)
Palace 1-2 (56 mins, 0 goals on, 1 goal off)
Southampton 1-1 (22 mins, 0 goals on, 1 goal off)
Leicester 1-0 (0 mins, 1 goal off)
West Ham 0-2 (29 mins, 0 goals on, 0 goals off)
Arsenal 1-1 (74 mins, 1 goal on, 0 goals off)
Newcastle 0-1 (0 mins, 0 goals off)
Liverpool 1-1 (0 mins, 1 goal off)
Norwich 3-1 (10 mins, 0 goals on, 3 goals off)
Bournemouth 0-1 (22 mins, 0 goals on, 0 goals off)
Brighton 3-1 (20 mins, 0 goals on, 3 goals off)
Total: 400 mins played, 680 mins not played, 6 goals on, 10 goals off
Goal every 67 mins while playing, every 68 mins while not playing
League Cup
Rochdale 1-1 (85 mins, 1 goal on, 0 goals off)
Chelsea 2-1 (67 mins, 1 goal on, 1 goal off)
Total: 152 mins played, 28 mins not played, 2 goals on, 1 goal off
Goal every 76 mins while playing, every 28 mins while not playing
Europa League
Astana 1-0 (22 mins, 1 goal on, 0 goals off)
AZ 0-0 (13 mins, 0 goals on, 0 goals off)
Partizan 1-0 (90 mins, 1 goal on, 0 goals off)
Partizan 3-0 (15 mins, 0 goals on, 3 goals off)
Total: 140 mins played, 220 mins not played, 2 goals on, 3 goals off
Goal every 70 mins while playing, every 73 mins while not playing
Grand total: 692 minutes played, 928 minutes not played, 10 goals on, 14 goals off
Goal every 69 minutes while playing, every 66 minutes while not playing
It's very marginal, though I imagine that 4-0 v Chelsea heavily skews things. Not to mention he only contributed to 1 assist against Rochdale anyway.