السلام عليكم و رحمة الله و بركاته
Answer: [By Muhammad Naseel Shahrukh]
It is proven by authentic hadith that this dua helps get out of trouble. But the particular format and the number need evidence. So it is not allowed for anyone to say this dua this particular number of times unless he finds evidence, or else it will be bidah.
So the way of saying this dua is the same as saying any other dua and nothing special can be done without evidence.
And Allah Knows the best!