12102831 divided by 109 
The aim is to understand the frequency of 109 in 12102831.

On to step 1:
When dividing 1 by 109, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 109

Step 2:
109 can be fit into 12 0 times, resulting in a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 109

Step 3:
109 goes into 121 1 times with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 109 from 121 to get 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 109

On to step 4:
120 divided by 109 is 1 with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtract 109 from 120 to get 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 109

Step 5:
The number 109 fits into 112 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 111.0
The remainder is 3 after subtracting 109 from 112.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 109

Going ahead to step 6:
The number 109 fits into 38 0 times, leaving a remainder of 38.
The number 0 becomes the next digit in our result. 
Result so far: 1110.0
The remainder is 38 after subtracting 0 from 38.
Fetch the next digit (3) from the dividend, attach it to 38 and continue: 383 / 109

On to step 7:
The number 109 fits into 383 3 times, leaving a remainder of 56.
Write down 3 as next digit of the result. 
Result so far: 11103.0
If we take 327 away from 383, we end up with 56.
Bring next digit (1) of the dividend behind the 56 and repeat the process: 561 / 109

Going ahead to step 8:
The number 109 fits into 561 5 times, leaving a remainder of 16.
The next digit of our result is 5. 
Result so far: 111035.0
Subtracting 545 from 561 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
The number 109 fits into 160 1 times, leaving a remainder of 51.
Record the quotient 1 as the next digit in the result. 
Result so far: 111035.1
If we take 109 away from 160, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 10:
109 goes into 510 4 times with a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 111035.14
Subtracting 436 from 510 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 11:
When dividing 740 by 109, we get 6 with a remainder of 86.
Write down 6 as next digit of the result. 
Result so far: 111035.146
The remainder is 86 after subtracting 654 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 12:
109 goes into 860 7 times with a remainder of 97.
Record the quotient 7 as the next digit in the result. 
Result so far: 111035.1467
If we subtract 763 from 860, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Let's proceed to step 13:
970 divided by 109 is 8 with a remainder of 98.
Record the quotient 8 as the next digit in the result. 
Result so far: 111035.14678
Subtract 872 from 970 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 14:
109 goes into 980 8 times with a remainder of 108.
Write down 8 as next digit of the result. 
Result so far: 111035.146788
If we take 872 away from 980, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

The final outcome is 111035.146788, with a leftover of 1.08e-05.