How does one even collect information about the probability of being hit by something that big in space ? They counted hits on things (ships) that came back from space ?
There are other points were stones collect like l4 and l5.
Then we have Hubble (and over 100 others as a benchmark, a few ships/missions like to the moon and Mars.
Herschel space observatory was also on l2. There is a wiki Artikel called 'list of objects at langrange points'
For example: https://solarsystem.nasa.gov/stardust/home/index.html