We look at the division of 76998641 by 839 
The aim is to understand the frequency of 839 in 76998641.

Let's proceed to step 1:
When dividing 7 by 839, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 839

Let's proceed to step 2:
76 divided by 839 is 0 with a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 76, we get 76.
Fetch the next digit (9) from the dividend, attach it to 76 and continue: 769 / 839

Moving on to step 3:
The number 839 fits into 769 0 times, leaving a remainder of 769.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 769 and we're left with 769.
Take the next digit (9) from the dividend and append it to 769, then repeat: 7699 / 839

Step 4:
When dividing 7699 by 839, we get 9 with a remainder of 148.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 7551 from 7699 to get 148.
Bring next digit (8) of the dividend behind the 148 and repeat the process: 1488 / 839

On to step 5:
The number 839 fits into 1488 1 times, leaving a remainder of 649.
Write down 1 as next digit of the result. 
Result so far: 91.0
Deduct 839 from 1488 and we're left with 649.
Fetch the next digit (6) from the dividend, attach it to 649 and continue: 6496 / 839

On to step 6:
839 can be fit into 6496 7 times, resulting in a remainder of 623.
Record the quotient 7 as the next digit in the result. 
Result so far: 917.0
Subtract 5873 from 6496 to get 623.
Append the next digit (4) from the dividend to 623 and continue with: 6234 / 839

Step 7:
The number 839 fits into 6234 7 times, leaving a remainder of 361.
Put 7 as the next digit of the answer. 
Result so far: 9177.0
Deduct 5873 from 6234 and we're left with 361.
Include the next digit (1) from the dividend after 361, then repeat: 3611 / 839

Advancing to step 8:
When dividing 3611 by 839, we get 4 with a remainder of 255.
Record the quotient 4 as the next digit in the result. 
Result so far: 91774.0
Subtract 3356 from 3611 to get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 9:
839 can be fit into 2550 3 times, resulting in a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 91774.3
Subtracting 2517 from 2550 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 10:
If we divide 330 by 839, we get 0 and a remainder of 330.
Write down 0 as next digit of the result. 
Result so far: 91774.3
Subtracting 0 from 330 leaves us with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Going ahead to step 11:
When dividing 3300 by 839, we get 3 with a remainder of 783.
Use 3 as the next digit of our solution. 
Result so far: 91774.303
Deduct 2517 from 3300 and we're left with 783.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7830, and continue the process.

Step 12:
If we divide 7830 by 839, we get 9 and a remainder of 279.
Record the quotient 9 as the next digit in the result. 
Result so far: 91774.3039
The remainder is 279 after subtracting 7551 from 7830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Advancing to step 13:
2790 divided by 839 is 3 with a remainder of 273.
The number 3 becomes the next digit in our result. 
Result so far: 91774.30393
Deduct 2517 from 2790 and we're left with 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

Advancing to step 14:
2730 divided by 839 is 3 with a remainder of 213.
The next digit of our result is 3. 
Result so far: 91774.303933
Subtracting 2517 from 2730 leaves us with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

In conclusion, the division gives 91774.303933 with a balance of 2.13e-05.