Hashtags

80,842 distinct hashtags across 743,413 attachments on 220,299 posts. That is 33.4% of the 658,980 in the corpus, but 76.5% of the 288,066 posts that carry a caption at all. The second is the number to read: 56.3% of videos have an empty caption upstream, and a post with no caption can carry no hashtag, so the ceiling is set by caption presence rather than by tagging habits. Shares below use posts-with-hashtags as the denominator.