The way I wrote down the points of night at which you can start ignoring Nightmare Freddy on a piece of paper was horrendous and needs to be redone, so for now they'll be waiting for me here until I come back to finish off this game:

Night 1 - 3:20

Nights 2&3 - 2:12

Night 4 - 2:40

Night 6 - 3:00

Nights 7&8 - 2:08

Nightmare BM/MF/IF - 2:30