We're dividing 16935323 by 821 
The aim is to understand the frequency of 821 in 16935323.

Going ahead to step 1:
821 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 821

Let's proceed to step 2:
The number 821 fits into 16 0 times, leaving a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 821

Moving on to step 3:
821 goes into 169 0 times with a remainder of 169.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 169, we get 169.
Grab the next digit (3) from the dividend, add it to 169, then carry on: 1693 / 821

Moving on to step 4:
If we divide 1693 by 821, we get 2 and a remainder of 51.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 1642 from 1693 to get 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 821

Advancing to step 5:
515 divided by 821 is 0 with a remainder of 515.
The next digit of our result is 0. 
Result so far: 20.0
If we subtract 0 from 515, we get 515.
Append the next digit (3) from the dividend to 515 and continue with: 5153 / 821

Moving on to step 6:
The number 821 fits into 5153 6 times, leaving a remainder of 227.
Write down 6 as next digit of the result. 
Result so far: 206.0
Deduct 4926 from 5153 and we're left with 227.
Include the next digit (2) from the dividend after 227, then repeat: 2272 / 821

On to step 7:
When dividing 2272 by 821, we get 2 with a remainder of 630.
Record the quotient 2 as the next digit in the result. 
Result so far: 2062.0
Subtracting 1642 from 2272 leaves us with 630.
Bring next digit (3) of the dividend behind the 630 and repeat the process: 6303 / 821

Advancing to step 8:
When dividing 6303 by 821, we get 7 with a remainder of 556.
The number 7 becomes the next digit in our result. 
Result so far: 20627.0
If we subtract 5747 from 6303, we get 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Advancing to step 9:
821 goes into 5560 6 times with a remainder of 634.
Put 6 as the next digit of the answer. 
Result so far: 20627.6
If we subtract 4926 from 5560, we get 634.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6340, and continue the process.

Moving on to step 10:
821 goes into 6340 7 times with a remainder of 593.
Record the quotient 7 as the next digit in the result. 
Result so far: 20627.67
Deduct 5747 from 6340 and we're left with 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

Let's proceed to step 11:
821 goes into 5930 7 times with a remainder of 183.
Use 7 as the next digit of our solution. 
Result so far: 20627.677
If we take 5747 away from 5930, we end up with 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Our division results in 20627.677 with a remaining 0.0183.