Lemma رَقَبَة has 2 unique word forms and appears 9 times in the Quran.

Word Translation Occurrences
رَقَبَةٖ (of) a believing slave, (of) a slave 8
ٱلرِّقَابِ freeing the necks (slaves), the necks, the (freeing of) the necks 6
رَقَبَةٍ a neck 2
رَقَبَةٖۖ a slave 2