2. An apparatus for organizing a collection of documents, comprising: memory hardware storing program instructions, and one or more processors in data communication with the memory hardware and configured to execute the program instructions, and upon execution the program instructions cause the one or more processors to perform operations comprising: identifying a plurality of documents responsive to a search query; accessing usage information associated with the plurality of documents, the usage information including, for each document, a frequency of visit value based on a number of times the document was visited and a unique visit value based on a number of unique visitors to the document; determining, for each document, a usage score from the frequency of visit value and the unique visit value associated with the document; and organizing the plurality of documents based, in part, on the usage scores for the documents.
2. An apparatus for organizing a collection of documents, comprising: memory hardware storing program instructions, and one or more processors in data communication with the memory hardware and configured to execute the program instructions, and upon execution the program instructions cause the one or more processors to perform operations comprising: identifying a plurality of documents responsive to a search query; accessing usage information associated with the plurality of documents, the usage information including, for each document, a frequency of visit value based on a number of times the document was visited and a unique visit value based on a number of unique visitors to the document; determining, for each document, a usage score from the frequency of visit value and the unique visit value associated with the document; and organizing the plurality of documents based, in part, on the usage scores for the documents. 13. The apparatus of claim 2 , wherein determining the usage score from the frequency of visit value and the unique visit value associated with the document comprises: determining a frequency of visit score based on the frequency of visit value and a maximum frequency of visit value; determining a unique user score based on the unique visit value and a maximum unique visit value; and determining the usage score from the frequency of visit score and the unique user score.