Abstract: Operation of a user interface includes performing token based analysis of a baseline text corpus and a targeted text listing. For a selected token in the targeted text listing, a matching baseline token in identified. From a plurality of contexts corresponding to the matching baseline token, context-matched and non-context matched usage data for the matching baseline token is identified and provided to a user interface. Similar processing may be performed on the basis of a related, but matching, baseline token. In another embodiment, instances of similar spelling errors are identified on the basis of a plurality of tokens identified in the targeted text listing.