In summary, the relative refractory period is a time in which the neuron can fire an action potential, but it needs a greater stimulus. During an action potential, voltage-gated sodium channels open to let in positive ions - sodium. These depolarize the cell.
On average, reciting five Mysteries of the Rosary typically takes about 15-20 minutes depending on whether the optional prayers are also recited. Additionally, some people may take longer than 20 minutes if they decide to devote extra time for reflection and meditation on any of the Mysteries.
The Catholic Rosary: There are 5 decades: 5x10= 50. There are 5 beads 1/each to announce the Mystery 5x1= 5. There are 5 beads 1/each for the opening prayers: 5x1=5. 50+5+5= 60 total beads. (However, if you were to pray an entire rosary you'd need a rosary with 4 times that many beads, as an Entire (or Full) Rosary is prayed with all 20 mysteries, meaning 220 beads plus the extra 5, so 225.) So, it doesn't look like 108 has anything to do with our Catholic Rosary. Blessings.