I'm surprised at how normal some of the unseen words are. I expected them to all be archaic or niche, but many are pretty reasonable: 'congregant', 'definer', 'stereoscope'.
It's likely that the commenter has read less than 5 million posts worth of text though. So perhaps this still points to a lack of diversity in content.
gkoberger|6 months ago
The dictionary site has only checked 4,920,000 posts, which is 0.28% of all messages.
IshKebab|6 months ago
SomewhatLikely|6 months ago
awinter-py|6 months ago
Kye|6 months ago