빈도수 분석 단계에서 기술용어마다 도출한 유의어도 같은 용어로 판단하여 유의어로 쓰인 문서도 빈도수에 포함하였다.
In the frequency analysis stage, the synonyms derived for each technical term were judged to be the same terms, and documents written as synonyms were included in the frequency count.