Top 10 amazing movie makeup transformations. Absolute frequency is a measurement of the total number of data units within a given class in a frequency distribution table. This, along with other measurements of frequency, can help quantify and explore the data to make it easier to understand.
In the 100 years from 1901 to 2000, there were 228 solar eclipses and 229 lunar ones. So over a long period of time, that's an average of roughly 2.3 of each kind every yearâ¦. There are typically 2 or 3 of each kind every year. But some years have only one, and occasionally there can be a year with as many as five.
There are 4 types of solar eclipses and they are determined by what part of the Moon's shadow falls on the Earth: 1  Total: A total solar eclipse takes place when the Moon completely covers the Sun and casts its umbra and penumbra on Earth. 2  A total eclipse of the Sun can only take place when the Moon is at perigee.