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