We're dividing 30753409 by 123 
The aim is to understand the frequency of 123 in 30753409.

Moving on to step 1:
123 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 123

Advancing to step 2:
123 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Append the next digit (7) from the dividend to 30 and continue with: 307 / 123

Step 3:
If we divide 307 by 123, we get 2 and a remainder of 61.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 246 from 307 leaves us with 61.
Grab the next digit (5) from the dividend, add it to 61, then carry on: 615 / 123

Moving on to step 4:
If we divide 615 by 123, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Deduct 615 from 615 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 123

Step 5:
123 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 250.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 123

Advancing to step 6:
The number 123 fits into 34 0 times, leaving a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 2500.0
The remainder is 34 after subtracting 0 from 34.
Take the next digit (0) from the dividend and append it to 34, then repeat: 340 / 123

On to step 7:
When dividing 340 by 123, we get 2 with a remainder of 94.
Put 2 as the next digit of the answer. 
Result so far: 25002.0
The remainder is 94 after subtracting 246 from 340.
Take the next digit (9) from the dividend and append it to 94, then repeat: 949 / 123

Advancing to step 8:
123 goes into 949 7 times with a remainder of 88.
The number 7 becomes the next digit in our result. 
Result so far: 250027.0
The remainder is 88 after subtracting 861 from 949.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 9:
123 can be fit into 880 7 times, resulting in a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 250027.7
Subtract 861 from 880 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
123 goes into 190 1 times with a remainder of 67.
Write down 1 as next digit of the result. 
Result so far: 250027.71
If we subtract 123 from 190, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 11:
670 divided by 123 is 5 with a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 250027.715
Subtracting 615 from 670 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 12:
123 goes into 550 4 times with a remainder of 58.
Put 4 as the next digit of the answer. 
Result so far: 250027.7154
The remainder is 58 after subtracting 492 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 13:
If we divide 580 by 123, we get 4 and a remainder of 88.
Put 4 as the next digit of the answer. 
Result so far: 250027.71544
Deduct 492 from 580 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

The quotient of the division is 250027.71544, and the remainder is 8.8e-05.