Hashtags

81,568 distinct hashtags across 757,444 attachments on 224,030 posts. That is 33.6% of the 666,654 in the corpus, but 76.5% of the 292,689 posts that carry a caption at all. The second is the number to read: 56.1% 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.