Is it common to have benign myoclonic jerks everyday?

Perhaps. Not unique to experience myoclonic jerks at night just prior to falling asleep. While asleep, such activity is entitled periodic limb movements of sleep, nocturnal myoclonus, and would be considered a sleep disorder. Daytime myoclonus is usually not normal, and may represent brain or spinal cord irritability. So, if frequent, and debilitating, need to have this evaluated further, as can be fixed.