There is the filed “Next period will start at” and timer at the top left corner.
But please make sure that:
1) your computer is switched on
2) you keep Chrome window not minimised / not collapsed. You can overlay this window by other programs or Chrome windows https://medium.com/linked-helper/is-it-possible-to-work-with-other-programs-or-chrome-tabs-when-linked-helper-is-running-4f937c5e0ef0?source=---------0----------------
3) Chrome tab with LinkedIn and Linked Helper is active / selected, because when you switch to another tab at the same Chrome window LinkedIn freezes page loading.
In any case you can manually click “Stop “ & “”Start …” to restart process at any moment. You will not lose your traction.