you get 400 from 2x200 quest per day, 2.5 days to get 1000 to get 5, or on average 2 frag per day.
If I do the math, it takes 50 days to get 100 frag.

That's not counting 1st wins, which I will chalk toward stamina pots just because
What are you doing wrong?

On a side note, my hidan is 5 star, I dunt need that heathen anymore.

so it's even faster, just 33 days, woohoo.

I only clear arena mission every 3-4 days, cause it require me using weird teams. So I haven't paid much attention.