Stem رَحْمَتُ has 3 unique word forms and appears 9 times in the Quran.

Word Translation Occurrences
وَرَحۡمَتُهُۥ and His Mercy 14
رَحۡمَتُ The Mercy of Allah 2
وَرَحۡمَتُ But (the) Mercy 2