As of my knowledge  Qualtrics’s Text iQ does not have built-in functionality to directly analyse correlations between topics or identify topic co-occurrence.
Text iQ is primarily designed to analyse and extract insights from text responses by using natural language processing techniques, such as sentiment analysis, keyword extraction, and text categorisation.

While Text iQ can provide valuable information about individual responses, it may not offer a direct analysis of correlations between topics or topic co-occurrence. To explore correlations between topics or identify frequently co-occurring topics, you may need to utilise additional tools or conduct custom analyses.