Nah, a minutes scale would require data entry frequently, and HN's volunteer moderators probably don't want to have to click "Reset breach counter" all the time, plus you'd need to write code for both that button and the minute counter.

Let's keep HN Javascript-light: "Days Since" is much easier to implement. Just one line of static HTML will do:

    <b>Days Since Last Breach: 0</b>

The UK ICO has an upper limit of 10 accounts leaked, above that they consider it to be a major breach.

I can't find a reference but when I first learned about this I was actually surprised the number was that low. That was before I realized that working with computers and databases for so long has totally desensitized me to the fact that we are dealing with stupendous amounts of data on a daily basis and that what we IT people see as 'small' is likely not what entities such as the ICO or other DPAs see as small.

Show a histogram. Logarithmic scale, number of accounts affected.

A rounding error.