How often can bristletails molt during their lives?

A bristletail (order Archaeognatha) can molt as many as 35 times during its life. These insects typically molt at a rate of three to five times per year.1

In the broader context of apterygotes, molting patterns vary significantly between groups. While bristletails have six instars including adults, other primitive wingless insects like the silverfish (order Zygentoma) may undergo more than 40 molts, sometimes molting more than two dozen times in a single year during their adult stage.2