I've done a lot of newspaper research, but up to now via traditional methods (i.e. going through page by page) combined with word searches in digitised collections. This excellent article from @JoshBlack gives some great insight into more powerful options for using historical newspapers.
(It also makes clear how much work is involved...)
New Publication: Creating Specialised Corpora from Digitized Historical Newspaper Archives | Joshua Wilson Black
https://joshua.wilsonblack.nz/post/digital-scholarship-in-the-humanities/
New Publication: Creating Specialised Corpora from Digitized Historical Newspaper Archives | Joshua Wilson Black
One of the promises of digital humanities for the ‘historical sciences’ is that we’ll be able to, in Tim Hitchcock’s words, shift from ‘piles of books’ to ‘maps of meaning’. That is, we’ll be able to produce high level representations of phenomena across large collections of text.