We look at the division of 821172 by 52 
The aim is to understand the frequency of 52 in 821172.

Going ahead to step 1:
The number 52 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 52

Let's proceed to step 2:
52 can be fit into 82 1 times, resulting in a remainder of 30.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 52 from 82, we get 30.
Append the next digit (1) from the dividend to 30 and continue with: 301 / 52

Let's proceed to step 3:
When dividing 301 by 52, we get 5 with a remainder of 41.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtract 260 from 301 to get 41.
Bring next digit (1) of the dividend behind the 41 and repeat the process: 411 / 52

Going ahead to step 4:
52 can be fit into 411 7 times, resulting in a remainder of 47.
The next digit of our result is 7. 
Result so far: 157.0
If we take 364 away from 411, we end up with 47.
Bring next digit (7) of the dividend behind the 47 and repeat the process: 477 / 52

Going ahead to step 5:
If we divide 477 by 52, we get 9 and a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 1579.0
Deduct 468 from 477 and we're left with 9.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 52

On to step 6:
The number 52 fits into 92 1 times, leaving a remainder of 40.
The next digit of our result is 1. 
Result so far: 15791.0
If we subtract 52 from 92, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 7:
If we divide 400 by 52, we get 7 and a remainder of 36.
Put 7 as the next digit of the answer. 
Result so far: 15791.7
If we subtract 364 from 400, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 8:
52 can be fit into 360 6 times, resulting in a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 15791.76
The remainder is 48 after subtracting 312 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 9:
If we divide 480 by 52, we get 9 and a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 15791.769
Subtracting 468 from 480 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 10:
If we divide 120 by 52, we get 2 and a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 15791.7692
If we take 104 away from 120, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
When dividing 160 by 52, we get 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 15791.76923
If we subtract 156 from 160, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 12:
If we divide 40 by 52, we get 0 and a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 15791.76923
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 13:
When dividing 400 by 52, we get 7 with a remainder of 36.
Record the quotient 7 as the next digit in the result. 
Result so far: 15791.7692307
Deduct 364 from 400 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 14:
52 can be fit into 360 6 times, resulting in a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 15791.76923076
Deduct 312 from 360 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 15791.76923076 with a remainder of 4.8e-08.