I agree with Country Road.... since I have several cars, I would be taking them to the shop all the time for 'time' vs. 'miles'.
I just sold a '95 Mercedes E320 Cabriolet last summer that I bought new and drove it 43,000 miles. I pretty much followed the mileage intervals which stretched a couple of years between fluid changes.
The car was garaged when not used, driven somewhat regularly and never any issues.
Personally, I would stick somewhat to a balance between time and miles.
2021.5 Pleasure Way Plateau FL Class-B Sprinter (bought May '21)
2018 Mini Cooper Hardtop Coupe, 2 dr. 6-speed manual (toad)
(Sold)2015 Prevost Liberty Coach,(Sold)2008 Monaco Dynasty