  We present high-statistics, precision measurements by AMS of the detailed
time and rigidity dependence of the primary cosmic-ray electron, positron,
proton and helium fluxes over 79 Bartels rotations from May 2011 to May 2017 in
the energy range from 1 to 50 GeV. For the first time, the charge-sign
dependent modulation during solar maximum has been investigated in detail by
leptons alone. We report the observation of short-term structures on the
timescale of months coincident in all the fluxes. These structures are not
visible in the positron-to-electron flux ratio. The precision measurements
across the solar polarity reversal show that the ratio exhibits a smooth
transition over ~800 days from one value to another.
