Frequency Table
A table that records how often values or class intervals occur in a dataset, optionally together with relative and cumulative frequencies.
A frequency table summarizes raw observations by counts rather than by listing every value. Discrete data can use individual values; continuous or wide-range data is often grouped into class intervals.
What it shows
Absolute frequency is the number of observations, relative frequency is the share of the total, and cumulative frequency is the running count up to a class boundary. A histogram is a visual relative of this representation, but the table and the chart are not the same object.
When data is grouped, class count and class width influence the summary. Sturges' Rule can provide a starting estimate, but it should not be treated as a universal optimum without considering the distribution.
For an implemented example, see Frequency Table Generation; for the statistical background, see Probability and Statistics.