How to find specific text phrases on a site

Not sure if this is the right place to ask, but here goes. One of my clients is changing part of their business next year, and it's going to impact SEO & PPC keywords.

Example: product is currently made from "Tibetan Walnut" but is instead going to be made from some other kind of wood.

Now, sure, I can go page by page and update the instances of Tibetan Walnut, but it's not on every page and there's a fairly large blog involved.

Apart from using google for "site:clientwebsite.com Tibetan Walnut" is there a way I can use Screaming Frog, Semrush, anything at all to crawl pages and flag for instances of this specific phrase?