I've been playing for a year now, and it took around four months for me to even consider trying to play it, and then it came to me, like all solos, about a week later.
Emerson, Lake & Palmer's Eruption? About a year.
"That was it, a nick. Now happily paid for. [...] It was decided that it was so far away in time and influence that...well, you only get caught when you're successful. That's the game". Robert Plant