Answer:
Actually, That is almost an impossible question to answer. Most words, year to year aren't repeated very often, but the words start out fairly easy probably commonly used words a child or anyone would hear in an ordinary day. Then they start to get a little harder.. words that may not be used as much... then harder.. words that the child has not heard at all.. then maybe if they are really good (the competitor), they will get really hard words that not even adults in the crowd or the child's teacher will even have heard before. That is my honest opinion.