We look at the division of 54033811 by 123 
The aim is to understand the frequency of 123 in 54033811.

Moving on to step 1:
123 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 123

On to step 2:
123 can be fit into 54 0 times, resulting in a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Take the next digit (0) from the dividend and append it to 54, then repeat: 540 / 123

Moving on to step 3:
When dividing 540 by 123, we get 4 with a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 492 away from 540, we end up with 48.
Grab the next digit (3) from the dividend, add it to 48, then carry on: 483 / 123

Advancing to step 4:
When dividing 483 by 123, we get 3 with a remainder of 114.
The next digit of our result is 3. 
Result so far: 43.0
Subtract 369 from 483 to get 114.
Take the next digit (3) from the dividend and append it to 114, then repeat: 1143 / 123

Advancing to step 5:
The number 123 fits into 1143 9 times, leaving a remainder of 36.
Write down 9 as next digit of the result. 
Result so far: 439.0
Subtract 1107 from 1143 to get 36.
Bring next digit (8) of the dividend behind the 36 and repeat the process: 368 / 123

Advancing to step 6:
The number 123 fits into 368 2 times, leaving a remainder of 122.
The number 2 becomes the next digit in our result. 
Result so far: 4392.0
Deduct 246 from 368 and we're left with 122.
Include the next digit (1) from the dividend after 122, then repeat: 1221 / 123

Step 7:
123 goes into 1221 9 times with a remainder of 114.
The number 9 becomes the next digit in our result. 
Result so far: 43929.0
The remainder is 114 after subtracting 1107 from 1221.
Include the next digit (1) from the dividend after 114, then repeat: 1141 / 123

Going ahead to step 8:
1141 divided by 123 is 9 with a remainder of 34.
Use 9 as the next digit of our solution. 
Result so far: 439299.0
If we subtract 1107 from 1141, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 9:
When dividing 340 by 123, we get 2 with a remainder of 94.
The number 2 becomes the next digit in our result. 
Result so far: 439299.2
Subtract 246 from 340 to get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

On to step 10:
The number 123 fits into 940 7 times, leaving a remainder of 79.
Record the quotient 7 as the next digit in the result. 
Result so far: 439299.27
Subtract 861 from 940 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 11:
123 goes into 790 6 times with a remainder of 52.
The next digit of our result is 6. 
Result so far: 439299.276
If we take 738 away from 790, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 12:
When dividing 520 by 123, we get 4 with a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 439299.2764
If we subtract 492 from 520, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 13:
If we divide 280 by 123, we get 2 and a remainder of 34.
Write down 2 as next digit of the result. 
Result so far: 439299.27642
If we subtract 246 from 280, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 14:
The number 123 fits into 340 2 times, leaving a remainder of 94.
The next digit of our result is 2. 
Result so far: 439299.276422
Subtracting 246 from 340 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Our division results in 439299.276422 with a remaining 9.4e-06.