4. Procedure
First, fifty-eight sets of BNC dialogues actually used in a business context, six monthly
textbooks used in “NHK Business Eigo” (Sugita, 2001), and sixteen TOEIC practice tests
were collected. Second, a word list was created for each and then used to calculate the extent
and overlap of three business-oriented vocabularies. Third, using statistical measures, three
specialized ESP word lists were created to observe the features of each business-oriented
vocabulary. Fourth, each vocabulary level was assessed. Finally, the rate of vocabulary
coverage provided by the school textbooks over the three business-oriented vocabularies was
identified. Each step is outlined below.