What occurs once in a minute, twice in a moment and never in one thousand years?

Question

A clock was correct at midnight.

From that moment it began to lose one minute per hour.

The clock stopped 90 minutes ago showing clock 16:43

What is the correct time now?

The clock runs for less than 24 hours.

Answer 1

The alphabet M.

Answer 2

Its the letter 'm'. It occurs once in a 'm'inute, twice in a 'm'o'm'ent, and never in one thousand years.

Answer 3

its a letter M