Wow, and I thought I didn't drive much.
My 2017 6 is 3 years and 3 months old with just over 10,000 miles on it.
I also have a 2002 Pathfinder that I drive sparingly now. Maybe 2000 miles a year, if that much.
I change the oil once a year in the Pathfinder, and I've done 3 oil changes in the Mazda, in a two and a half year period.
I'm thinking in your case, somewhat depending on what kind of climate you live in, that I'd go once a year, and go with synthetic.