We get this question a lot. From left to right:
Played Last – the date the song was last played
Played Since – the number of shows between the time it was last played and this show
Song Count Tour – the number of times a song has been played during the tour as of this show / the total number of times the song has been played during the tour. So for the last/current show of a tour, the first and last number would be the same. TD next to the number means this is a tour debut for that song.
Song Count All-Time – like the number above but for all time: the number of times a song has been played all-time as of this show / the total number of times the song has been played all-time.
Rarity All-Time – A number given to a song to try and give a sense of how rare a song was at the time of the show. It factors in the number of shows where the song has been played since it’s debut (either album or live debut date) and the number of shows since it was last played. The higher the number, the rarer the song. The number assigned to the song during the show does not change, in other words, future song plays don’t make that song any less rare for that particular show. The show’s all-time rarity on the right is the avg of the song rarities for that show.
Tour Rarity – On the right you’ll see tour rarity. That number is how rare a song is for that tour only (the higher the rarer). This number is simply the number of times the song was played during the tour divided by the number of shows subtracted from 100. So if a song was played 3 times out of 10 shows, it would have a rarity number of 70. This number does change as additional shows are played in the tour. The ranking of each show’s rarity is on the main show page.