Counts based on variable 'epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/feeps/srvy/l2/electron/2015/09/mms3_feeps_srvy_l2_electron_20150901000000_v7.1.1.cdf. The most common cadence, 2419200000 [ns] = PT2.4192S, occurred for 9.5741% of the 2268 timesteps. 

Counts based on variable 'epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/feeps/srvy/l2/electron/2025/03/mms3_feeps_srvy_l2_electron_20250327000000_v7.5.1.cdf. The most common cadence, 2460224000 [ns] = PT2.460224S, occurred for 24.8220% of the 8717 timesteps. 