We're dividing 15350959 by 820 
The aim is to understand the frequency of 820 in 15350959.

On to step 1:
820 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
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 / 820

Let's proceed to step 2:
820 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 820

Moving on to step 3:
153 divided by 820 is 0 with a remainder of 153.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 153, we get 153.
Grab the next digit (5) from the dividend, add it to 153, then carry on: 1535 / 820

Step 4:
820 goes into 1535 1 times with a remainder of 715.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 820 from 1535 and we're left with 715.
Append the next digit (0) from the dividend to 715 and continue with: 7150 / 820

Step 5:
If we divide 7150 by 820, we get 8 and a remainder of 590.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Deduct 6560 from 7150 and we're left with 590.
Bring next digit (9) of the dividend behind the 590 and repeat the process: 5909 / 820

Advancing to step 6:
The number 820 fits into 5909 7 times, leaving a remainder of 169.
Put 7 as the next digit of the answer. 
Result so far: 187.0
If we take 5740 away from 5909, we end up with 169.
Take the next digit (5) from the dividend and append it to 169, then repeat: 1695 / 820

Going ahead to step 7:
820 goes into 1695 2 times with a remainder of 55.
Write down 2 as next digit of the result. 
Result so far: 1872.0
The remainder is 55 after subtracting 1640 from 1695.
Fetch the next digit (9) from the dividend, attach it to 55 and continue: 559 / 820

Going ahead to step 8:
820 can be fit into 559 0 times, resulting in a remainder of 559.
Put 0 as the next digit of the answer. 
Result so far: 18720.0
Deduct 0 from 559 and we're left with 559.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

Let's proceed to step 9:
5590 divided by 820 is 6 with a remainder of 670.
Use 6 as the next digit of our solution. 
Result so far: 18720.6
The remainder is 670 after subtracting 4920 from 5590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

Moving on to step 10:
6700 divided by 820 is 8 with a remainder of 140.
Use 8 as the next digit of our solution. 
Result so far: 18720.68
Deduct 6560 from 6700 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 11:
When dividing 1400 by 820, we get 1 with a remainder of 580.
Put 1 as the next digit of the answer. 
Result so far: 18720.681
Deduct 820 from 1400 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Step 12:
When dividing 5800 by 820, we get 7 with a remainder of 60.
The next digit of our result is 7. 
Result so far: 18720.6817
The remainder is 60 after subtracting 5740 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 13:
The number 820 fits into 600 0 times, leaving a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 18720.6817
Subtract 0 from 600 to get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 14:
When dividing 6000 by 820, we get 7 with a remainder of 260.
Record the quotient 7 as the next digit in the result. 
Result so far: 18720.681707
If we subtract 5740 from 6000, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 15:
820 can be fit into 2600 3 times, resulting in a remainder of 140.
Use 3 as the next digit of our solution. 
Result so far: 18720.6817073
The remainder is 140 after subtracting 2460 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 16:
820 can be fit into 1400 1 times, resulting in a remainder of 580.
Use 1 as the next digit of our solution. 
Result so far: 18720.68170731
If we subtract 820 from 1400, we get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

The final outcome is 18720.68170731, with a leftover of 5.8e-07.