Finding the frequency of occurrence of unique combinations of items

To understand frequent itemsets one first needs to understand frequent and itemsets. Let us first look at what itemsets mean. simply put itemsets are the group of items that appear together in a transaction or record. The size of the group could be as small as 1 to as large as the number of all items within that transaction or record. Even size 0 could be considered but that would not produce anything meaningful.

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