I change the engine oil and oil filter every year. I do about 4000 miles a year and bought the car almost 4 years ago.
I did not even know there was a pollen filter until I saw someone on youtube changing one.
My car has done about 31000 miles. The pollen filter was filthy and I replaced it.
The air filter was ok and I replaced it.
Not sure what time or mile intervals they should be changed, from a search it is coming back as 12K to 15K miles or once a year for the pollen filter, the air filter every 30k miles.
How often do you change yours?