The purpose of this study is to analysis frequency and typicality of example words used in textbooks. We use 14 textbooks corresponding 2011 educational curriculum for analysis and the unit we examined was about word formations, especially derived words. the scope of this study was limited to areas of understanding of the concepts. The result of analysis of derived words is summarized as follows. Top 5 derived words by prefix on frequency were ‘치솟다(323), 맨발(221), 짓밟다(201), 한여름(195), 참기름(170)’, and ‘0-2’ frequency were 24 words included ‘덧버선, 풋김치, 개철쭉’ etc. Top 5 derived words by suffix on frequency ‘손님(2500), 놀이(1613), 길이(1156), 높이(920), 날개(876)’, and ‘0-2’ frequency were ‘구두장이(2), 먹보(1), 잠보(1), 침질(1), 꾀보(0)’. The result of analysis of typicality is summarized as follows. The prefixes which blur the boundaries were ‘늦-’, ‘참-’, and the suffixes were ‘-님’, ‘-기’. Also, There is a ‘풋내기’ which was not composed of ‘root+affix’ synchronically. We discussed about result of analysis of frequency and typicality. 1) Example words used textbook must be reexamined on results of analysis of frequency. 2) The root frequency is also concerned. 3) Words which have the discrepancy between frequency and typicality are included in areas of inquiry learning not understanding of concepts.