How often should the thread filter/cartridge for mechanical cleaning be changed?

In the private house, there is one flask with a thread filter at the entrance (immediately after the meter). The water is supplied from the city, but the use of a filter is still necessary. In the last six months, I have disassembled the faucets several times to clean them from dirt (aerators and faucet cartridges).

For the future, there is an idea to add more filters to improve water quality. But for now, let's talk about the mechanical cleaning cartridge made of polypropylene thread. What does the manufacturer (Ecosoft) tell us? The resource of the polypropylene thread filter (in my case) is 15,000 liters (15 cubic meters). I was a bit skeptical about such a figure and considered it purely marketing, motivating to purchase/replace. It is suitable for mechanical cleaning from sand, silt, rust, and scale.

But after living in a house where dirt from the water clogs faucets, shower heads, and damages heating elements - I realized that this should not be neglected. The cost of the filter is up to 3 dollars each, while repairs and time are significantly more expensive.

Regarding drinking water - I use a separate filter (reverse osmosis). By the way, its (I mean all filters) resource will be increased due to supplying cleaner water to it. So I recommend looking at the meter to understand water consumption per month. Conditionally, if the water consumption is 7 cubic meters per month - the filter needs to be changed every two months (provided that the resource is 15 cubic meters).

Tip - buy 2 filters at once to always have a replacement on hand.