Let's divide 52197218 by 521
The aim is to understand the frequency of 521 in 52197218.

Advancing to step 1:
521 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 521

Advancing to step 2:
52 divided by 521 is 0 with a remainder of 52.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Take the next digit (1) from the dividend and append it to 52, then repeat: 521 / 521

Going ahead to step 3:
If we divide 521 by 521, we get 1 and a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 521 from 521 to get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 521

Moving on to step 4:
If we divide 9 by 521, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 9, we end up with 9.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 521

Advancing to step 5:
The number 521 fits into 97 0 times, leaving a remainder of 97.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
If we take 0 away from 97, we end up with 97.
Grab the next digit (2) from the dividend, add it to 97, then carry on: 972 / 521

Advancing to step 6:
521 goes into 972 1 times with a remainder of 451.
Record the quotient 1 as the next digit in the result. 
Result so far: 1001.0
If we subtract 521 from 972, we get 451.
Append the next digit (1) from the dividend to 451 and continue with: 4511 / 521

Moving on to step 7:
521 can be fit into 4511 8 times, resulting in a remainder of 343.
Write down 8 as next digit of the result. 
Result so far: 10018.0
Subtracting 4168 from 4511 leaves us with 343.
Fetch the next digit (8) from the dividend, attach it to 343 and continue: 3438 / 521

Step 8:
The number 521 fits into 3438 6 times, leaving a remainder of 312.
Record the quotient 6 as the next digit in the result. 
Result so far: 100186.0
Deduct 3126 from 3438 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 9:
3120 divided by 521 is 5 with a remainder of 515.
The next digit of our result is 5. 
Result so far: 100186.5
Deduct 2605 from 3120 and we're left with 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

Step 10:
When dividing 5150 by 521, we get 9 with a remainder of 461.
The next digit of our result is 9. 
Result so far: 100186.59
Deduct 4689 from 5150 and we're left with 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

Let's proceed to step 11:
If we divide 4610 by 521, we get 8 and a remainder of 442.
The next digit of our result is 8. 
Result so far: 100186.598
Subtract 4168 from 4610 to get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Advancing to step 12:
If we divide 4420 by 521, we get 8 and a remainder of 252.
The next digit of our result is 8. 
Result so far: 100186.5988
If we take 4168 away from 4420, we end up with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

The final result is 100186.5988 with a remainder of 0.00252.