Root د ا ب(d A b) has 4 unique word forms and appears 6 times in the Quran.

English gloss Persist, Persevere, Eagerness, Habit

Word Translation Occurrences
كَدَأۡبِ Like behavior, Like (the) way 6
دَأۡبِ (the) plight 2
دَأَبٗا as usual 2
دَآئِبَيۡنِۖ both constantly pursuing their courses 2