We're dividing 83690880 by 843 
The aim is to understand the frequency of 843 in 83690880.

On to step 1:
8 divided by 843 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 843

Moving on to step 2:
If we divide 83 by 843, we get 0 and a remainder of 83.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Grab the next digit (6) from the dividend, add it to 83, then carry on: 836 / 843

Moving on to step 3:
843 goes into 836 0 times with a remainder of 836.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 836 and we're left with 836.
Bring next digit (9) of the dividend behind the 836 and repeat the process: 8369 / 843

Going ahead to step 4:
If we divide 8369 by 843, we get 9 and a remainder of 782.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we subtract 7587 from 8369, we get 782.
Bring next digit (0) of the dividend behind the 782 and repeat the process: 7820 / 843

Going ahead to step 5:
843 goes into 7820 9 times with a remainder of 233.
The next digit of our result is 9. 
Result so far: 99.0
Deduct 7587 from 7820 and we're left with 233.
Grab the next digit (8) from the dividend, add it to 233, then carry on: 2338 / 843

Let's proceed to step 6:
2338 divided by 843 is 2 with a remainder of 652.
Use 2 as the next digit of our solution. 
Result so far: 992.0
Subtract 1686 from 2338 to get 652.
Bring next digit (8) of the dividend behind the 652 and repeat the process: 6528 / 843

Going ahead to step 7:
When dividing 6528 by 843, we get 7 with a remainder of 627.
Write down 7 as next digit of the result. 
Result so far: 9927.0
Deduct 5901 from 6528 and we're left with 627.
Append the next digit (0) from the dividend to 627 and continue with: 6270 / 843

Advancing to step 8:
When dividing 6270 by 843, we get 7 with a remainder of 369.
The number 7 becomes the next digit in our result. 
Result so far: 99277.0
Subtract 5901 from 6270 to get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Let's proceed to step 9:
843 goes into 3690 4 times with a remainder of 318.
Put 4 as the next digit of the answer. 
Result so far: 99277.4
The remainder is 318 after subtracting 3372 from 3690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Advancing to step 10:
If we divide 3180 by 843, we get 3 and a remainder of 651.
Write down 3 as next digit of the result. 
Result so far: 99277.43
The remainder is 651 after subtracting 2529 from 3180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

Going ahead to step 11:
843 goes into 6510 7 times with a remainder of 609.
Record the quotient 7 as the next digit in the result. 
Result so far: 99277.437
Deduct 5901 from 6510 and we're left with 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

Going ahead to step 12:
843 goes into 6090 7 times with a remainder of 189.
Record the quotient 7 as the next digit in the result. 
Result so far: 99277.4377
Subtracting 5901 from 6090 leaves us with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

The quotient of the division is 99277.4377, and the remainder is 0.00189.