The Visualization research community has historically had some papers that might be of interest to you, for example... TOPIC ISLANDS — A Wavelet-Based Text Vis

The Visualization research community has historically had some papers that might be of interest to you, for example... TOPIC ISLANDS — A Wavelet-Based Text Visualization System, https://www.computer.org/csdl/proceedings-article/ieee-vis/1998/91760189/12OmNvqEvKm https://www.computer.org/csdl/proceedings-article/ieee-vis/1...