24.25% of all years are leap years. They are usually every four years except at the end of most centuries.
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it depends if you add leap years
Yes, it would have to If it weren't for leap years, it would happen every 7 years. Since there are leap years, call it 28 years.
Some things that happen once every four years include: - Leap Years - US Elections - The Olympics
16 leap years
You do the math. Divide 365 into 1000.-------------------Well if you want it in years, months, weeks and days, it's more complicated. The answer varies according to where in the year you're starting from (because of February) and if there is a leap year in that time.Starting from a 1st of January, with no leap year, it's two years, 8 months, three weeks and six days.-------------------