We look at the division of 880123 by 9 
The aim is to understand the frequency of 9 in 880123.

Advancing to step 1:
9 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 9

Going ahead to step 2:
9 goes into 88 9 times with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 81 from 88 and we're left with 7.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 9

On to step 3:
70 divided by 9 is 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
The remainder is 7 after subtracting 63 from 70.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 9

Advancing to step 4:
9 goes into 71 7 times with a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 977.0
If we subtract 63 from 71, we get 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 9

Step 5:
If we divide 82 by 9, we get 9 and a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 9779.0
Subtract 81 from 82 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 9

Let's proceed to step 6:
If we divide 13 by 9, we get 1 and a remainder of 4.
The next digit of our result is 1. 
Result so far: 97791.0
Subtracting 9 from 13 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
40 divided by 9 is 4 with a remainder of 4.
The next digit of our result is 4. 
Result so far: 97791.4
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
40 divided by 9 is 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 97791.44
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 97791.44 with a remainder of 0.004.