We look at the division of 70207952 by 821 
The aim is to understand the frequency of 821 in 70207952.

On to step 1:
The number 821 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 821

Moving on to step 2:
If we divide 70 by 821, we get 0 and a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 70 to get 70.
Take the next digit (2) from the dividend and append it to 70, then repeat: 702 / 821

Moving on to step 3:
If we divide 702 by 821, we get 0 and a remainder of 702.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 702 and we're left with 702.
Append the next digit (0) from the dividend to 702 and continue with: 7020 / 821

Moving on to step 4:
The number 821 fits into 7020 8 times, leaving a remainder of 452.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 6568 from 7020 leaves us with 452.
Fetch the next digit (7) from the dividend, attach it to 452 and continue: 4527 / 821

Going ahead to step 5:
821 can be fit into 4527 5 times, resulting in a remainder of 422.
The next digit of our result is 5. 
Result so far: 85.0
If we subtract 4105 from 4527, we get 422.
Include the next digit (9) from the dividend after 422, then repeat: 4229 / 821

Let's proceed to step 6:
821 goes into 4229 5 times with a remainder of 124.
Use 5 as the next digit of our solution. 
Result so far: 855.0
Subtracting 4105 from 4229 leaves us with 124.
Grab the next digit (5) from the dividend, add it to 124, then carry on: 1245 / 821

Going ahead to step 7:
821 goes into 1245 1 times with a remainder of 424.
The next digit of our result is 1. 
Result so far: 8551.0
The remainder is 424 after subtracting 821 from 1245.
Bring next digit (2) of the dividend behind the 424 and repeat the process: 4242 / 821

Going ahead to step 8:
The number 821 fits into 4242 5 times, leaving a remainder of 137.
Record the quotient 5 as the next digit in the result. 
Result so far: 85515.0
Deduct 4105 from 4242 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 9:
821 goes into 1370 1 times with a remainder of 549.
Record the quotient 1 as the next digit in the result. 
Result so far: 85515.1
The remainder is 549 after subtracting 821 from 1370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Moving on to step 10:
When dividing 5490 by 821, we get 6 with a remainder of 564.
Use 6 as the next digit of our solution. 
Result so far: 85515.16
The remainder is 564 after subtracting 4926 from 5490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

On to step 11:
If we divide 5640 by 821, we get 6 and a remainder of 714.
Record the quotient 6 as the next digit in the result. 
Result so far: 85515.166
Subtract 4926 from 5640 to get 714.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7140, and continue the process.

Our division results in 85515.166 with a remaining 0.0714.