This tutorial will describe how to use inMeXes, a system that rapidly searches for English expressions in PubMed/MEDLINE. “inMeXes” is developed and maintained by the Database Center for Life Science (DBCLS). "inMeXes" incrementally searches expressions of multiple words appearing not less than 10 times in PubMed/MEDLINE titles and abstracts.The search results display candidate expressions together with the number of appearance among PubMed/MEDLINE indexed publications. Using inMeXes, users can for example, search for candidate prepositions that follow a certain verb or usage of a certain word in English.