Frequency Distribution is a representation, either in a tabular format or a graphical format that displays the no. of observations within the given interval. The given intervals should be exhaustive and mutually exclusive. They are usually used within a statistical context.
The size of the intervals used in a frequency distribution depends a lot on the data that is being analyzed and also on the goals of the analyst. Still, the key factor is that the intervals used must contain all of the possible observations and be non-overlapping.
Given below is how a frequency distribution in a tabular format for weekly stock returns would look like: