You're talking about calendars. Those are different
from real years, but OK, we'll do it your way:
1 "regular" year = 365 days
1 "leap" year = 366 days
38 regular years + 17 leap years = 38 (365) + 17 (365 + 1) = 55 (365) + 17 = 20,092 days
1 day = 86,400 seconds
20,092 days = 20,092 x 86,400 = 1,735,948,800 seconds
63072000 seconds for a regular year, but 63244800 seconds in a leap year.
86,400 seconds more than in a regular (non-leap) year.
There is 3 175 200 000 seconds in a millennium with leap years.
142009200 seconds approx. The exact number depends on how many leap years there were in the interval and on whether or not there were any leap seconds.
164099520 seconds approx. The exact number depends on how many leap years there were in the interval and on whether or not there were any leap seconds.
47336400 seconds approx. The exact number depends on how many leap years there were in the interval and on whether or not there were any leap seconds.
536,112,000 seconds without leap years.
1893456000 seconds approx. The exact number depends on how many leap years there were in the interval and on whether or not there were any leap seconds.
757382400 seconds approx. The exact number depends on how many leap years there were in the interval and on whether or not there were any leap seconds.
1609437600 seconds approx. The exact number depends on how many leap years there were in the interval and on whether or not there were any leap seconds.
60s X 60m =3600sX 24=86400s X 365d= 31536000X 6yr =189216000 seconds in 6 years -- another answer -- there are 60 seconds in a minute 60 minutes in an hour (which equals 3,600 seconds) 24 hours in a day (which equals 86,400 seconds) 365 days in a (regular) year (which equals 31,536,000 seconds) 366 day in a leap year (which equals 31,622,400) So, as six consecutive years will definitely include one leap year we get 5 regular years (which equals 157,680,000 seconds) and one leap year - together this totals 189,302,400 seconds. But, there could be two leap years in six consecutive years and that would mean 4 ordinary years (which equals 126,144,000 seconds) and 2 leap years (which equals 63,244,800 seconds) and that total is 189,388,800 seconds.
Depends on how many are leap years.