We look at the division of 17242 by 9 
The aim is to understand the frequency of 9 in 17242.

On to step 1:
The number 9 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 9

Moving on to step 2:
9 goes into 17 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 9 away from 17, we end up with 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 9

On to step 3:
82 divided by 9 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
Subtract 81 from 82 to get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 9

Let's proceed to step 4:
9 can be fit into 14 1 times, resulting in a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 191.0
The remainder is 5 after subtracting 9 from 14.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 9

Step 5:
If we divide 52 by 9, we get 5 and a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 1915.0
Subtracting 45 from 52 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 6:
The number 9 fits into 70 7 times, leaving a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 1915.7
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
9 goes into 70 7 times with a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 1915.77
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 1915.77, with a leftover of 0.007.