What is the maximum number of times that a course shows up in different transcripts and what is that course's enrollment id?
SELECT count(*) ,  student_course_id FROM Transcript_Contents GROUP BY student_course_id ORDER BY count(*) DESC LIMIT 1
SELECT count(*) ,  student_course_id FROM Transcript_Contents GROUP BY student_course_id ORDER BY count(*) DESC LIMIT 1
[{'count(*)': 4, 'student_course_id': 0}]