1. A method comprising: determining, by a processing device, 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; presenting 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, presenting in the GUI a second GUI element comprising the similarity ratings associated with the reference document; and in response to selecting one of the similarity ratings, presenting 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.
5. The method of claim 1 , further comprising: receiving user input via the GUI to retrieve similar documents having a similarity rating matching a similarity rating threshold, wherein the similarity rating threshold is at least one of a default similarity rating threshold and a user-specified similarity rating threshold; and displaying the similar documents having a similarity rating matching the similarity rating threshold.