An electric current flows through a parallel circuit. Which units tell you about the amount of electrons traveling in the circuit?
a. ohms
b. amps
c. volts
'Ampere' is the unit of current. That's the rate at which electrons travel in the circuit ... the number of electrons every second. If you wanted the actual amount or number of electrons, you'd need to know the length of time too.
It doesn't matter whether we're talking about a parallel or series circuit.