A couple of years ago, I replaced a pair of little-used (and only during
the summer) standard 20 amp Leviton 3-way toggle light switches
controlling a Hunter Original ceiling fan because at least one of the
switches had failed.

I installed the same then-current model Levitons and everything worked
fine for a few years. And don't you know, at least one of them has just
now failed!

The original switches and the fan were installed during a room addition
construction project by a licensed electrician hired by the general
contractor whom we've used for years and does very good work.

What are the chances of this being just a random second switch failure
vs. needing to get an electrician out to check it over?

--
Not saying lumber prices are getting out of hand but I was thinking of
building a birdhouse except the bank turned down the loan