Stem فَتَ has 3 unique word forms and appears 7 times in the Quran.

Word Translation Occurrences
فَتَنَّا We (have) tried, We tested, We tried, We try 10
فَتَنَّٰهُ We (had) tried him 2
وَفَتَنَّٰكَ and We tried you 2