If you're using the GUI wallet, pass the mouse's cursor over the nomad logo at the bottom-left of the screen (it'll provide the expected time based on your proportion of the network-weight).  If you're using a command-line wallet, the "getstakinginfo" command will give you that same info.

I don't know about the other pool but Cryptohub seems to be staking about 1.4 NMD per day per 1000 in my account; this is roughly the rate of stakes generated in my local wallet (which I don't keep up 24/7 though).  From that -- although this is not a very robust calculation (a quick five-day evaluation/sample-size   ) -- that equates to about a 50.9% expected return over the course of a year -- on staking (and ignoring possible price-appreciation).  [ The math is: getting a daily percentage return by dividing the stake-amounts-generated by the wallet balance then, getting a longer-term average over the evaluation-period and then multiplying the ~0.0014 by 365 which yields a little above 50% ].

Based on that admittedly-rough/non-exhaustive empirical estimate (and a little trial-and-error with a calculator) then I suppose about 35,800 NMD should on average generate a stake daily in a local wallet if you're staking 24/7 (35,800*0.0014 = 50.12) .

Like some other coins, the local wallet seems to generate lucky streaks on a given day (several stakes one day, relatively few the next).