We look at the division of 457631 by 9 
The aim is to understand the frequency of 9 in 457631.

Moving on to step 1:
The number 9 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 9

Step 2:
If we divide 45 by 9, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 45 from 45, we get 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 9

Going ahead to step 3:
7 divided by 9 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
If we take 0 away from 7, we end up with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 9

Going ahead to step 4:
9 can be fit into 76 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 508.0
If we subtract 72 from 76, we get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 9

Moving on to step 5:
If we divide 43 by 9, we get 4 and a remainder of 7.
The next digit of our result is 4. 
Result so far: 5084.0
If we subtract 36 from 43, we get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 9

Advancing to step 6:
9 goes into 71 7 times with a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 50847.0
Deduct 63 from 71 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 7:
9 can be fit into 80 8 times, resulting in a remainder of 8.
The next digit of our result is 8. 
Result so far: 50847.8
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
The number 9 fits into 80 8 times, leaving a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 50847.88
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 50847.88, with a leftover of 0.008.