What is the probability of this occurring within a noticeable time-frame? Without an estimate a lack of occurrence does not disprove anything. Even if dark mat

What is the probability of this occurring within a noticeable time-frame? Without an estimate a lack of occurrence does not disprove anything. Even if dark matter is supposed to make up 85% of the universe it is unlikely to be distributed in the same way as other matter. For example if it does not interact with gravity, or as strongly, it could be comparatively uniformly distributed or at least more dispersed compared to matter. In which case the probability of a particle intersecting a human would be astronomical. Just opening this door, but some actual estimates from those with the domain knowledge and experience would be nice.