15600812 ÷ 139 
The aim is to understand the frequency of 139 in 15600812.

Moving on to step 1:
When dividing 1 by 139, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 139

Going ahead to step 2:
The number 139 fits into 15 0 times, leaving a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 139

Step 3:
The number 139 fits into 156 1 times, leaving a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 139 from 156 leaves us with 17.
Bring next digit (0) of the dividend behind the 17 and repeat the process: 170 / 139

Going ahead to step 4:
170 divided by 139 is 1 with a remainder of 31.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 139 away from 170, we end up with 31.
Take the next digit (0) from the dividend and append it to 31, then repeat: 310 / 139

On to step 5:
When dividing 310 by 139, we get 2 with a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 112.0
The remainder is 32 after subtracting 278 from 310.
Include the next digit (8) from the dividend after 32, then repeat: 328 / 139

Step 6:
139 can be fit into 328 2 times, resulting in a remainder of 50.
The next digit of our result is 2. 
Result so far: 1122.0
The remainder is 50 after subtracting 278 from 328.
Bring next digit (1) of the dividend behind the 50 and repeat the process: 501 / 139

Moving on to step 7:
501 divided by 139 is 3 with a remainder of 84.
Write down 3 as next digit of the result. 
Result so far: 11223.0
Subtract 417 from 501 to get 84.
Bring next digit (2) of the dividend behind the 84 and repeat the process: 842 / 139

Advancing to step 8:
If we divide 842 by 139, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 112236.0
Deduct 834 from 842 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
If we divide 80 by 139, we get 0 and a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 112236.0
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 10:
The number 139 fits into 800 5 times, leaving a remainder of 105.
Use 5 as the next digit of our solution. 
Result so far: 112236.05
The remainder is 105 after subtracting 695 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

On to step 11:
When dividing 1050 by 139, we get 7 with a remainder of 77.
The number 7 becomes the next digit in our result. 
Result so far: 112236.057
Deduct 973 from 1050 and we're left with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 12:
770 divided by 139 is 5 with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 112236.0575
If we subtract 695 from 770, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 13:
If we divide 750 by 139, we get 5 and a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 112236.05755
The remainder is 55 after subtracting 695 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

The quotient of the division is 112236.05755, and the remainder is 5.5e-05.