How many times did Matthew Henson failed to reach the north pole?

Matthew Henson, an American explorer, made several attempts to reach the North Pole, but he is most famously known for his successful expedition in 1909 alongside Robert Peary. Prior to that, Henson participated in multiple earlier expeditions to the Arctic, but those did not achieve the goal of reaching the Pole. While exact counts of failed attempts can vary, it is generally understood that he was part of several expeditions that fell short before the successful one in 1909.