Deep fryer oil guidelines
Serious eats has a good overview https://www.seriouseats.com/2013/09/ask-the-food-lab-how-many-times-can-i-reuse-fry-oil.html
There is not a &quot;how many times&quot; or &quot;good for a number of days&quot; answer because there are too many variables, but your linked article clearly spells out what to look for to know when to discard.
Working in a high volume kitchen, we filtered the oil in each fryer for three services, and discarded it after the fourth. The exception was if we cooked fish, the oil would be discarded following that service.