Nearly 3/4 of the time there are 2 eclipses in a year. On the other hand, it is quite rare to have 5 solar eclipses in a single year. The last time it happened was in 1935 and the next time is 2206. Typically there is 1 total eclipse every 1 to 2 years. Although it is possible to have 2 total eclipses in a single year, it is quite rare.
http://mreclipse.com/Special/SEprimer.html
Total solar eclipses happen when the Moon completely covers the Sun, and it can only take place when the Moon is near perigee, the point of the Moon's orbit closest to Earth. You can only see a total solar eclipse if you're in the path where the Moon's casts its darkest shadow, the umbra.
https://www.timeanddate.com/eclipse/solar-eclipse.html
February 10: A penumbral eclipse will be visible from North America tonight, as the Moon passes through the Sun’s outer shadow. The shadow is so faint, though, that most skywatchers won’t notice it. February 26: An annular solar eclipse will be visible across parts of the southern hemisphere.
https://stardate.org/nightsky/eclipses
Certain phenomena can only be seen during a total solar eclipse: 1  Shadow bands: About 1 minute before totality, moving wavy lines of alternating light and dark can be seen on the ground and along walls. These shadow bands are the result of Earth’s turbulent atmosphere refracting the last rays of sunlight.
http://www.timeanddate.com/eclipse/total-solar-eclipse.html
Since New Moon occurs every 29 1/2 days, you might think that we should have a solar eclipse about once a month. Unfortunately, this doesn't happen because the Moon's orbit around Earth is tilted 5 degrees to Earth's orbit around the Sun.
http://mreclipse.com/Special/SEprimer.html
But not everyone experiences every solar eclipse. Getting a chance to see a total solar eclipse is rare. The moon’s shadow on Earth isn’t very big, so only a small portion of places on Earth will see it. You have to be on the sunny side of the planet when it happens. You also have to be in the path of the moon’s shadow.
https://spaceplace.nasa.gov/eclipses/en/
A total solar eclipse can last for several hours. Totality can range from a few seconds to 7.5 minutes. The longest total solar eclipse of the 21st century took place on July 22, 2009 when the totality lasted 6 minutes and 39 seconds. Total solar eclipses typically happen a little less than once a year when:
http://www.timeanddate.com/eclipse/total-solar-eclipse.html
As seen from the Earth, a solar eclipse is a type of eclipse that occurs when the Moon passes between the Sun and Earth, and the Moon fully or partially blocks (occults) the Sun. This can happen only at new moon when the Sun and the Moon are in conjunction as seen from Earth in an alignment referred to as syzygy.
https://en.wikipedia.org/wiki/Solar_eclipse
From our perspective on Earth, two types of eclipses occur: lunar, the blocking of the Moon by Earth's shadow, and solar, the obstruction of the Sun by the Moon. When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon.
https://stardate.org/nightsky/eclipses
In a total eclipse, the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured. If the Moon were in a perfectly circular orbit, a little closer to the Earth, and in the same orbital plane, there would be total solar eclipses every month.
https://en.wikipedia.org/wiki/Solar_eclipse
when last did we have a solar eclipse?
In 1935 we had last solar eclipse. We had the last a solar eclipse in 1935.