39720916 ÷ 839 
The aim is to understand the frequency of 839 in 39720916.

Let's proceed to step 1:
839 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 839

On to step 2:
If we divide 39 by 839, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Include the next digit (7) from the dividend after 39, then repeat: 397 / 839

Let's proceed to step 3:
When dividing 397 by 839, we get 0 with a remainder of 397.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 397 and we're left with 397.
Append the next digit (2) from the dividend to 397 and continue with: 3972 / 839

Step 4:
839 goes into 3972 4 times with a remainder of 616.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 3356 from 3972 to get 616.
Take the next digit (0) from the dividend and append it to 616, then repeat: 6160 / 839

Going ahead to step 5:
839 goes into 6160 7 times with a remainder of 287.
The next digit of our result is 7. 
Result so far: 47.0
Subtract 5873 from 6160 to get 287.
Take the next digit (9) from the dividend and append it to 287, then repeat: 2879 / 839

Moving on to step 6:
839 can be fit into 2879 3 times, resulting in a remainder of 362.
Record the quotient 3 as the next digit in the result. 
Result so far: 473.0
Deduct 2517 from 2879 and we're left with 362.
Append the next digit (1) from the dividend to 362 and continue with: 3621 / 839

Advancing to step 7:
839 can be fit into 3621 4 times, resulting in a remainder of 265.
Use 4 as the next digit of our solution. 
Result so far: 4734.0
If we take 3356 away from 3621, we end up with 265.
Grab the next digit (6) from the dividend, add it to 265, then carry on: 2656 / 839

Going ahead to step 8:
When dividing 2656 by 839, we get 3 with a remainder of 139.
The number 3 becomes the next digit in our result. 
Result so far: 47343.0
Subtract 2517 from 2656 to get 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Advancing to step 9:
839 can be fit into 1390 1 times, resulting in a remainder of 551.
Use 1 as the next digit of our solution. 
Result so far: 47343.1
If we subtract 839 from 1390, we get 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

On to step 10:
5510 divided by 839 is 6 with a remainder of 476.
Use 6 as the next digit of our solution. 
Result so far: 47343.16
If we subtract 5034 from 5510, we get 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Going ahead to step 11:
839 goes into 4760 5 times with a remainder of 565.
The next digit of our result is 5. 
Result so far: 47343.165
If we take 4195 away from 4760, we end up with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Advancing to step 12:
The number 839 fits into 5650 6 times, leaving a remainder of 616.
Write down 6 as next digit of the result. 
Result so far: 47343.1656
If we take 5034 away from 5650, we end up with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Moving on to step 13:
839 can be fit into 6160 7 times, resulting in a remainder of 287.
Record the quotient 7 as the next digit in the result. 
Result so far: 47343.16567
Deduct 5873 from 6160 and we're left with 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

Step 14:
839 can be fit into 2870 3 times, resulting in a remainder of 353.
Put 3 as the next digit of the answer. 
Result so far: 47343.165673
Subtracting 2517 from 2870 leaves us with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Moving on to step 15:
The number 839 fits into 3530 4 times, leaving a remainder of 174.
The number 4 becomes the next digit in our result. 
Result so far: 47343.1656734
Subtracting 3356 from 3530 leaves us with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

On to step 16:
1740 divided by 839 is 2 with a remainder of 62.
The next digit of our result is 2. 
Result so far: 47343.16567342
If we take 1678 away from 1740, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The quotient of the division is 47343.16567342, and the remainder is 6.2e-08.