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Input: Plot Peak Usage

This tool allows you to produce several line graphs depicting changes in term frequency over time. The method uses a rolling-average to minimze artifacts of small-group sampling (which can cause wild variation) and gives a clear indication of how term usage changes year to year. Output includes graphs of raw frequencies and relative frequencies of the terms you select, as well as z-scores to assist in determining if the difference from the norm is statistically significant. Follow the blue hyperlinks to the Glossary page for additional information.
1. List Terms to Examine:

Put your terms here. Because of the statistic used, you must choose a single term type, either words or collocations . Collocations are denoted by hyphenation: tobacco-smoke, lung-cancer . If you forget, the computer will limit analysis to the first term type it encounters.
2. or

NIH-NCI Tobacco-Documents Project at the University of Georgia (Grant # 1 RO1 CA87490). The scripts run by this server are the invention of Clayton Darwin using Python . All graphical displays are created on the fly using ChartDirector© from ASE .