Those add up pretty fast if you're doing full on-site days. A couple of years ago I interviewed for two FAANGs. Along with phone screens, on site, and a couple of supplementary interviews, and then team selection interviews, it easily got to 18 or so. And that was just two companies.

I’ve only been put through the wringer like that once thankfully. I think I’m also lucky to have mostly made moves based on recommendations so end up dealing directly with specific teams at big companies.