Question: what is the most important event associated with swimming?
Answer: freestyle: 50m, 100m, 200m, 400m, 800m and 1500m.
backstroke: 100m and 200m.
breaststroke: 100m and 200m.
butterfly: 100m and 200m.
medley: 200m and 400m.
freestyle relay: 4 x 100m, 4 x 200m.
medley relay: 4 x 100m (men, women, mixed)
open water: 10km.