To me execution is how you build the business. Timing would mean deciding not to do it at all for another 10 years, or that you already missed the opportunity and thus give up before starting, which seems like something completely different. I’m also far from the only one — google “execution luck timing” and read up from others who can possibly getter differentiate for you.
It's hard for me to say how much we agree and are simply not communicating properly, but my main point is that the people giving advice do not properly acknowledge how lucky they were to succeed.
I largely consider execution to be what you can control, and luck to be what you can't. You can break those down much further, but I really feel those are the important categories.
