9. A system comprising: a memory; and a processing device coupled with the memory to: determine counts of documents similar to a reference document for a plurality of similarity ratings, each similarity rating being based on a number of co-occurring terms between the reference document and corresponding similar documents; present in a graphical user interface (GUI) the reference document and a GUI element pertaining to the documents similar to the reference document; and upon a selection of the GUI element, present in the GUI second GUI element comprising similarity ratings associated with the reference document; and in response to selecting one of the similarity ratings, present in the second GUI element a visual representation of the counts of similar documents that indicate a number of documents that are retrievable based on the selected similarity rating, wherein the visual representation is provided prior to retrieving one of the similar documents.
12. The system of claim 9 , wherein the processing device is further to: receive input via the GUI of a user-specified similarity rating threshold; and present in the GUI a number representing the similar documents having a similarity rating matching the user-specified similarity rating threshold.