Lunar eclipses happen on average about two times per year. The Moon's orbit is tilted about five degrees to Earth's orbit, so not every full moon results in a lunar eclipse. The number of lunar eclipses in a year can range from two to five, but usually, there are around two. Total lunar eclipses occur approximately every 2.5 years at any given location, and partial lunar eclipses occur at least once a year or once every two years. Additionally, the maximum number of lunar eclipses in a single year can be five, which is very rare. The last time that happened was in 1879, and the next time it will happen is in 2132. To summarize:

• Average lunar eclipses per year: 2
• Maximum possible lunar eclipses per year: 5 (rare)
• Total lunar eclipse frequency at one location: roughly every 2.5 years
• Partial lunar eclipses: at least once a year or every two years

This is because lunar eclipses only occur during full moons when the Moon crosses Earth's shadow, but due to the Moon's orbital tilt, this alignment is not monthly.