He completed a two-year apprenticeship at the carpentry shop, mastering the basic skills.

apprenticeship 是由名词 apprentice（学徒）加上后缀 -ship 构成的名词。apprentice 指"跟随师傅学习手艺的学徒"，后缀 -ship 表示"身份、状态或关系"。apprenticeship 合起来指"学徒身份"或"学徒期"，即跟随师傅学习手艺的时期。