How can I search and list a Domains webpages that contain an exact word or phrase?

For example:

I want to search all Pages on www.Tesco.com for the phrase "£199.99", to identify all product pages on that domain whereby the product sells for £199.99, and be able to have a list or even view the pages one by one.

Or for example be able to search all Pages on www.Scan.co.uk for those that contain the phrase "Currently Out of Stock".

Is there any Software that can do this for me?

I hope this makes sense.

Frankie

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