This is the wrong subforum,
for what coin DMD Diamond coin?
7days per image on their announce page.
once 7 days passes its complex as to how many coins you have and how long you leave you wallet open as to how quickly you get a stake on your inputs. and once they stake its 7 days + 180 blocks until they are eligible to stake again.
questions should go here:
https://bitcointalk.org/index.php?topic=580725.0For some staking coins out there, the waiting time is over a week.