31534359 ÷ 123 
The aim is to understand the frequency of 123 in 31534359.

Going ahead to step 1:
3 divided by 123 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 123

Moving on to step 2:
123 goes into 31 0 times with a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 31, we get 31.
Bring next digit (5) of the dividend behind the 31 and repeat the process: 315 / 123

On to step 3:
123 goes into 315 2 times with a remainder of 69.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 246 from 315 and we're left with 69.
Bring next digit (3) of the dividend behind the 69 and repeat the process: 693 / 123

Advancing to step 4:
The number 123 fits into 693 5 times, leaving a remainder of 78.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Subtracting 615 from 693 leaves us with 78.
Fetch the next digit (4) from the dividend, attach it to 78 and continue: 784 / 123

Step 5:
123 goes into 784 6 times with a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 256.0
If we take 738 away from 784, we end up with 46.
Grab the next digit (3) from the dividend, add it to 46, then carry on: 463 / 123

Going ahead to step 6:
When dividing 463 by 123, we get 3 with a remainder of 94.
The number 3 becomes the next digit in our result. 
Result so far: 2563.0
If we take 369 away from 463, we end up with 94.
Bring next digit (5) of the dividend behind the 94 and repeat the process: 945 / 123

Moving on to step 7:
If we divide 945 by 123, we get 7 and a remainder of 84.
Record the quotient 7 as the next digit in the result. 
Result so far: 25637.0
If we take 861 away from 945, we end up with 84.
Take the next digit (9) from the dividend and append it to 84, then repeat: 849 / 123

Advancing to step 8:
849 divided by 123 is 6 with a remainder of 111.
Put 6 as the next digit of the answer. 
Result so far: 256376.0
The remainder is 111 after subtracting 738 from 849.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Moving on to step 9:
1110 divided by 123 is 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 256376.9
If we subtract 1107 from 1110, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 10:
The number 123 fits into 30 0 times, leaving a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 256376.9
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 11:
If we divide 300 by 123, we get 2 and a remainder of 54.
Put 2 as the next digit of the answer. 
Result so far: 256376.902
If we subtract 246 from 300, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 12:
123 goes into 540 4 times with a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 256376.9024
If we subtract 492 from 540, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 13:
480 divided by 123 is 3 with a remainder of 111.
Put 3 as the next digit of the answer. 
Result so far: 256376.90243
Subtract 369 from 480 to get 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Moving on to step 14:
123 can be fit into 1110 9 times, resulting in a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 256376.902439
Subtracting 1107 from 1110 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 15:
123 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 256376.902439
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 16:
The number 123 fits into 300 2 times, leaving a remainder of 54.
Put 2 as the next digit of the answer. 
Result so far: 256376.90243902
Deduct 246 from 300 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 256376.90243902, with a leftover of 5.4e-08.