Looks like 16 with another coming up next week. As for how many more times, once per album. Cookie cutter shows ended my interest in traveling to see them more than once per tour.
Dallas, 8/16/02
Dallas, 6/25/03
Dallas, 8/2/05
NYC, 4/1/06
Dallas, 8/2/07
Dallas, 6/9/10
Houston, 6/9/10
Houston, 10/25/11
Austin, 10/26/11
Dallas, 10/27/11
Austin, 7/7/12
Dallas, 7/9/12
Wallingford, 4/20/16
NYC, 4/22/16
Dallas, 12/13/16
Dallas, 12/2/17