There's no regular schedule. Here are a few facts:
-- The closest together that two eclipses can possibly be is about 2 weeks.
-- On the average over a period of many years, there are about 2.3 lunar eclipses
and 2.3 solar ones every year.
But that's a long-term average.
-- There can be anywhere from one to five eclipses in one year ... lunar, solar, or mixed.
About twice a year.
NEVER
NEVER
Every 360 years.
When Earth, the moon and the Sun are perfectly aligned. Not very often...
A Solar Eclipse can only occur at a NEW MOON. Similarly a Lunar Eclipse can only occur at a FULL MOON.
A solar eclipse can only occur at the time of New Moon. A lunar eclipse can only occur at the time of Full Moon.
In 2017, a solar eclipse will occur in USA not Pakistan.
Solar eclipses happen twice a year or so. The problem is that the geometry is a little touchy; if it isn't just so, you won't get a total eclipse, but only a partial eclipse. And the area of the Earth affected by the solar eclipse is very small; a path about 100 miles wide and a few thousand miles long. Since 75% of the Earth's surface is water, a lot of eclipses aren't visible on land at all. NASA's Eclipse web page will let you see when each eclipse will occur, and where.
solar eclipse occur when earth came between sun and moon
A lunar eclipse can only occur at the time of Full Moon.
A solar eclipse can only occur at a time of a new moon.