This is a 2% year stake reward coin, this depend of you weight in the network, if you have a good amount of coins you can stake daily without problems. i donīt speak english very well maybe someone else that speak english can explain you better than me.
I am also not a native English Speaker. I wanted to know, how long i need to keep my wallet open to get stake coin ? If i have 1 million coin, how long I need to keep my wallet ?