Some of the FAs were done solo:
1855. Half Dome - Cables Route FA: George Anderson, 10/1875
1865. Psychedelic Shack FA: Sean Plunkett
1867. Queen of Spades FA: Charles Cole, 7/1984
1872. The Long Walk FA: Eric George, 8/2000
1883. Solitary Confinement FA: Eric George, 6/1999
1897. Road Rage FA: Eric Kohl (free route, maybe with a partner?)
1904. Lost Again FA: Eric Kohl, 1992
Actually, if you believe (like I do) that the non-free routes up there are rarely repeated, I did answer it.
Tis-sa-ack probably gets some repeats, the other aid routes probably very rarely.
It is just one of those places with a long approach - you might as well do a FA instead of repeating something.
All the stats are in the FA data in this case, and the numerator is 5.
Denominator (aid routes other than Tis-sa-ack) is 27, so about 20% solos on the HD rarely repeated aid routes.
As Werner noted, Tis-sa-ack has been soloed at least once, so maybe 20% solos might not be far off for Tis-sa-ack as well.
Historical note. The first solo of the regular route was by Eric Beck, in 1967 I recall. Two days on the wall, then a 3rd bivy in Camp 4 when the party was so righteous he couldn't find his camp afterward.
FAKT: No one is answering the question. Yeah, it's BEHN DUHN. Don't give a fuKK.
how OFTEN is IT DUNN???
With that being the starting point, who the fukk would give a sh#t how often the half dome is climbed? Is that going to be the deciding factor on wether you grow a pair aid the thing so you can answer your own fikking question?
Other optional answers to the question:
1. Have you solo (aid)ed half dome? If norm then the answer is never. It's never been done.. We're all waiting for someone to go for it.
2. Yes. People solo (aid) half dome all the time. Those people are usually called sissies, but it does get done.
3. Are you bad ass enough to find out yourself?
in regards to the OP... ....right-o: I believe the correct answer would be that HD non-regular routes get soloed on an average of approximately every .67 years. I could be a little off. cheers and beers