1. A computer-implemented method comprising: under control of a processor executing instructions, receiving a selection of a filter from a user device; determining a baseline frequency count for each term of a plurality of terms in first content items published outside of a specified time period, wherein the first content items each include the filter, the baseline frequency count comprised of an average frequency count of each term for a baseline time period that is prior to the specified time period; determining a changed frequency count for each term in second content items published within the specified time period, wherein determining the baseline frequency count and the changed frequency count includes indexing the respective terms comprising storing information including at least one of: an associated frequency count, an associated content item, or an associated content source; determining a first change in frequency count for each term by comparing the baseline frequency count to the changed frequency count for each term; displaying a report representing the first change in the frequency count for each term, the report graphically indicating, in font size, a magnitude of the first change in the frequency count for each term; receiving a selected term included in the report; filtering the first content items and the second content items by the filter and the selected term; determining a second change in frequency count for each term by comparing the baseline frequency count to the changed frequency count for each term included in the filtered first content items and the filtered second content items; and displaying the report representing the second change in the frequency count for each term, the report graphically indicating, in font size, the magnitude of the second change in the frequency count for each term.