The number of backlinks you get per day should look 'natural'.
So what does that mean?
5 per day every day is not natural
10 per day every day is not natural
1000 one day and then none for the next 6 weeks is not natural
That's not to say that you can't gain 1000 good links in one day and they not count (think viral content that is shared all over the internet 1 week) but its likely that that content would die off in some sort of exponential fashion.
Likewise non-viral content would probably gain links in starts and fits and but overall gain traction as the content ranks higher and more people see it and more people link to it... aka the content would build momentum.
So my advice?
5 one day, 7 the next, 2 the next, 10 the next, 0 the next.... etc.
Days that you post something new/update.... add more links (as this should happen with natural links - fresh content fresh links)
TL

R - Make your links look natural and don't just add X links per day.