35539439 ÷ 820 
The aim is to understand the frequency of 820 in 35539439.

Let's proceed to step 1:
820 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 820

Moving on to step 2:
If we divide 35 by 820, we get 0 and a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 35 to get 35.
Bring next digit (5) of the dividend behind the 35 and repeat the process: 355 / 820

Step 3:
355 divided by 820 is 0 with a remainder of 355.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 355 after subtracting 0 from 355.
Include the next digit (3) from the dividend after 355, then repeat: 3553 / 820

On to step 4:
820 goes into 3553 4 times with a remainder of 273.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 3280 from 3553 leaves us with 273.
Append the next digit (9) from the dividend to 273 and continue with: 2739 / 820

Step 5:
The number 820 fits into 2739 3 times, leaving a remainder of 279.
The next digit of our result is 3. 
Result so far: 43.0
Subtract 2460 from 2739 to get 279.
Grab the next digit (4) from the dividend, add it to 279, then carry on: 2794 / 820

Moving on to step 6:
820 can be fit into 2794 3 times, resulting in a remainder of 334.
Write down 3 as next digit of the result. 
Result so far: 433.0
Subtracting 2460 from 2794 leaves us with 334.
Include the next digit (3) from the dividend after 334, then repeat: 3343 / 820

Moving on to step 7:
If we divide 3343 by 820, we get 4 and a remainder of 63.
Use 4 as the next digit of our solution. 
Result so far: 4334.0
Deduct 3280 from 3343 and we're left with 63.
Fetch the next digit (9) from the dividend, attach it to 63 and continue: 639 / 820

Going ahead to step 8:
If we divide 639 by 820, we get 0 and a remainder of 639.
Put 0 as the next digit of the answer. 
Result so far: 43340.0
Subtracting 0 from 639 leaves us with 639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6390, and continue the process.

Step 9:
820 can be fit into 6390 7 times, resulting in a remainder of 650.
Put 7 as the next digit of the answer. 
Result so far: 43340.7
The remainder is 650 after subtracting 5740 from 6390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

Step 10:
6500 divided by 820 is 7 with a remainder of 760.
The number 7 becomes the next digit in our result. 
Result so far: 43340.77
If we subtract 5740 from 6500, we get 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

The final result is 43340.77 with a remainder of 0.76.