Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/helios/helios1/e6_particle_flux_kunow/1hour_cdf/1974/helios1_e6_kunow_1hour_particle-flux_19741212_v01.cdf. The most common cadence, 840000 [ms] = PT14M, occurred for 12.7292% of the 9644 timesteps. 