The HathiTrust Research Center (HTRC) is the research arm of the HathiTrust Digital Library (HTDL). The HathiTrust Consortium is a multi-institutional partnership that seeks to preserve the cultural record by digitizing books, serials, and other forms of information and making them available digitally through the HTDL.
The Hathi Trust Digital Library has millions of volumes of digitized content and grows in number every day.
Using the HathiTrust+Bookworm tool, you can visualize lexical trends.
This guide will teach you how to use HT+BW.