If you are solo mining it will all depend upon how much hashing power you have. Based upon your question I would assume that you have very, very little hashing power and there is a chance that you might never mine a block.
Your best bet is to join a mining pool - then you will be assured of something and will see your accumulated shares.
No, I've joined pool
www.electroneum.space and have 860 h/s in cryptonight algorithm. I have the same results on another pools to. So maybe I'm doing smth wrong. And I can't understand what exactly.