If you wish to view the whole Voyant GUI for 1973, click here The StreamGraph shows the frequency of the words throughout the corpus.  In the Reader view below, you can see the frequency of the words by hovering over the words. The bar graph at the bottom shows how long the documents are and can be compared between each other. In the TermsRadio visualization below, it shows the frequency of the words throughout the documents in this case over time. You can click on a word to see how the word fluctuates over time.