The riddle contest to win steem

Here comes the riddle contest on steemit where you stand a chance to win some steem.

1.UPVOTE THE POST[THIS MAY HELP ME TO GET THE FUNDS FOR RUNNING THE CONTEST]

2.RESTEEM THE POST ELSE YOUR ENTRY WILL NOT BE VALID

3.THIS TIME 1 LUCKY WINNER

WILL BE SELECTED AND THE REWARD WILL BE 2 STEEM .

4.THE WINNERS WILL BE SELECTED VIA http://www.randomresult.com/ YOU CAN SEE THE WINNER IN MY NEXT POST [AFTER 7 DAYS FROM TODAY or the next post]

5.ONLY ONE ENTRY IS VALID SO PLEASE DON'T PUT MULTIPLE ANSWERS .

Here is the RIDDLE for you give it a try:

What comes once in a minute ,twice in a moment but never in a thousand years?
Now think and put your answers in comment section.