<p><strong><em>Co-occurrence (Plain Text)</em></strong> is a free, web-based tool designed to run in a browser window. It is easy to use, designed to <strong>search</strong> for two words or patterns within a user-specified distance apart and show all instances matching the specifications within a document, either hosted at a web address or uploaded from the user's files.</p> <p>Users may set the <strong>context</strong> to words, lines, sentences or paragraphs and specify what length of that context to look within (ex: 5 words, 2 paragraphs). Larger contexts will slow the tool's processing, particularly for novel-length texts. Searching a <strong>pattern</strong> rather than a word requires skill with <strong>regular expressions</strong> and is thus not accessible to all users.</p> <p>Other features include an option to exclude words appearing in the Glasgow <strong>stop list</strong> from the list of collocates and output formats including <strong>XML Tree</strong> and<strong> tab delimited</strong>.</p> <p>This tool has only two minor <strong>problems</strong>. When the tab delimited output is selected, the tool may not process some characters correctly; please see List Words (Plain Text) for examples. In addition the tool has difficulty with the text structure of poetry and may not give results when the context is set to paragraph.</p> <p><strong><em>In summation, Co-occurrence (Plain Text) is an effective way to see where two words or patterns appear in relation to one another.</em></strong> Versions are also available for HTML and XML documents.</p>