・enroll=進学、登録、入会など
(例)
I would like to know why you enrolled in this course.
She is going to enroll in this program.
・college enrollment rate=大学進学率
「大学進学率」の場合はcollege enrollment rateと言います。
(例)
This graph shows the college enrollment rate of recent years.
お役立てれば幸いです。