Dificult Riddles!

I couldn’t find Answers!!!
you know answers?!

1-what occurs once in a minute,twice in a moment, but never in an hour?

2-what goes around the world and stays in a corner?

3-the man who made it, doesn’t want it
the man who bought it, doesn’t need it
the man who needs it doesn’t know it

4-what’s the beginning of eternity,
the end of time and space,
the beginning of the end,
and the end of every place?

Hi they’re all easy riddles :). I can help you.

1/ Letter M.

3/ We have the same riddle:
The maker doesn’t buy it.
The buyer doesn’t use it.
The user doesn’t see it.
What is it?
The answer is the COFFIN !

4/ Letter E.