We're dividing 83704325 by 821 
The aim is to understand the frequency of 821 in 83704325.

Advancing to step 1:
The number 821 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 821

Going ahead to step 2:
When dividing 83 by 821, we get 0 with a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 83 to get 83.
Fetch the next digit (7) from the dividend, attach it to 83 and continue: 837 / 821

Let's proceed to step 3:
If we divide 837 by 821, we get 1 and a remainder of 16.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 821 from 837 and we're left with 16.
Include the next digit (0) from the dividend after 16, then repeat: 160 / 821

Going ahead to step 4:
If we divide 160 by 821, we get 0 and a remainder of 160.
The next digit of our result is 0. 
Result so far: 10.0
Subtract 0 from 160 to get 160.
Bring next digit (4) of the dividend behind the 160 and repeat the process: 1604 / 821

Moving on to step 5:
1604 divided by 821 is 1 with a remainder of 783.
Use 1 as the next digit of our solution. 
Result so far: 101.0
Subtracting 821 from 1604 leaves us with 783.
Fetch the next digit (3) from the dividend, attach it to 783 and continue: 7833 / 821

Moving on to step 6:
7833 divided by 821 is 9 with a remainder of 444.
Record the quotient 9 as the next digit in the result. 
Result so far: 1019.0
Deduct 7389 from 7833 and we're left with 444.
Grab the next digit (2) from the dividend, add it to 444, then carry on: 4442 / 821

Advancing to step 7:
If we divide 4442 by 821, we get 5 and a remainder of 337.
Record the quotient 5 as the next digit in the result. 
Result so far: 10195.0
If we take 4105 away from 4442, we end up with 337.
Include the next digit (5) from the dividend after 337, then repeat: 3375 / 821

On to step 8:
821 goes into 3375 4 times with a remainder of 91.
Use 4 as the next digit of our solution. 
Result so far: 101954.0
Deduct 3284 from 3375 and we're left with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 9:
821 can be fit into 910 1 times, resulting in a remainder of 89.
The next digit of our result is 1. 
Result so far: 101954.1
Subtracting 821 from 910 leaves us with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 10:
821 can be fit into 890 1 times, resulting in a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 101954.11
If we subtract 821 from 890, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The quotient of the division is 101954.11, and the remainder is 0.069.