event,interval
1,0.928571429
2,1
3,0.928571429
4,0.785714286
5,0.928571429
6,1
7,0.857142857
8,1.285714286
9,0.785714286
10,1.285714286
11,0.785714286
12,1
13,0.785714286
14,0.857142857
15,0.928571429
16,0.857142857
17,0.857142857
18,1.285714286
19,0.714285714
20,0.857142857
21,1