According to Fred Whipple's book 'Earth, Moon and Planets', page 102-104, Solar eclipses are fairly numerous, about 2 - 5 per year, but the area on the ground covered by totality is only a few miles wide. In any given location on Earth, a total eclipse happens only once every 360 years. Eclipses of the Moon by the Earth's shadow are actually less numerous than solar eclipses, however each eclipse covers about 1/2 the surface of the Earth. At any given location you can have up to 3 lunar eclipses per year, but some year there may be none. In any one calendar year, the maximum number of eclipses is 4 solar and 3 lunar, from some locations on the Earth.