Hashtags

80,578 distinct hashtags across 737,598 attachments on 218,428 posts. That is 33.4% of the 653,233 in the corpus, but 76.5% of the 285,602 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.