8. The computer-readable storage medium of claim 3 wherein the operations further comprise: based on the analyzing, tracking a frequency of occurrence for different text-based terms in the collection having a common root, each of the root terms associated with at least one text-based term in the ordered collection having the respective root term in common.
3. The computer-readable storage medium of claim 1 wherein the operations further comprise, based on the analyzing, creating a tree in which a first term in a given grouping of the groupings is defined as a parent node in the tree and a second term in the given grouping is defined as a child node of the parent node in the tree, both the first term and the second term in the given grouping being consecutive text-based terms present in the order collection.