You are comparing miles to number of taxis, and some vague frequency of accidents vs an inexact statistic. I appreciate you trying, but I believe accident statistics are normally based on "per million vehicle miles traveled". If you're trying to make a statistic, you should probably use that basis.
Waymo doesn’t operate in NYC and uses a different metric for number of accidents so it’s not that simple to directly compare, which is why I just gave accidents per day to give a sense of scale.
If you think it’s meaningful, NYC taxi average 70k miles per year and Waymo’s accidents are included in the link.
