Board Thread:Help and Questions/@comment-98.15.88.103-20190430090421

I'm confused by this statement on the Skill Chart page: "how many Tsums are required to level up to the next skill level...". I don't understand what that means: I have to buy that Tsum that many times? Use it that many times to raise the skill level? I'm just trying to figure out how to raise the skill level of each Tsum without waiting for tickets if that's possible  