Hashtags

80,865 distinct hashtags across 743,954 attachments on 220,475 posts. That is 33.4% of the 659,514 in the corpus, but 76.5% of the 288,309 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.