It's 180 days (or 15,552,000 seconds) at the moment. I have it documented in the rating guide, but I should probably mention it somewhere in the report. I am no

It's 180 days (or 15,552,000 seconds) at the moment. I have it documented in the rating guide, but I should probably mention it somewhere in the report. I am not sure that's long enough, by the way. There are some important sites I visit only once in a long while, and I would prefer to be protected on every visit. For your needs (HSTS preloading), a shorter value is probably fine.