55579940 divided by 525 
The aim is to understand the frequency of 525 in 55579940.

Advancing to step 1:
525 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 525

Going ahead to step 2:
If we divide 55 by 525, we get 0 and a remainder of 55.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 55, we get 55.
Include the next digit (5) from the dividend after 55, then repeat: 555 / 525

Advancing to step 3:
When dividing 555 by 525, we get 1 with a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 525 from 555 and we're left with 30.
Fetch the next digit (7) from the dividend, attach it to 30 and continue: 307 / 525

On to step 4:
525 can be fit into 307 0 times, resulting in a remainder of 307.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 307 leaves us with 307.
Bring next digit (9) of the dividend behind the 307 and repeat the process: 3079 / 525

Let's proceed to step 5:
3079 divided by 525 is 5 with a remainder of 454.
The next digit of our result is 5. 
Result so far: 105.0
If we subtract 2625 from 3079, we get 454.
Grab the next digit (9) from the dividend, add it to 454, then carry on: 4549 / 525

Going ahead to step 6:
If we divide 4549 by 525, we get 8 and a remainder of 349.
The next digit of our result is 8. 
Result so far: 1058.0
Subtract 4200 from 4549 to get 349.
Append the next digit (4) from the dividend to 349 and continue with: 3494 / 525

Moving on to step 7:
When dividing 3494 by 525, we get 6 with a remainder of 344.
Use 6 as the next digit of our solution. 
Result so far: 10586.0
Subtract 3150 from 3494 to get 344.
Bring next digit (0) of the dividend behind the 344 and repeat the process: 3440 / 525

Going ahead to step 8:
525 can be fit into 3440 6 times, resulting in a remainder of 290.
The next digit of our result is 6. 
Result so far: 105866.0
Subtracting 3150 from 3440 leaves us with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

On to step 9:
The number 525 fits into 2900 5 times, leaving a remainder of 275.
The next digit of our result is 5. 
Result so far: 105866.5
Subtract 2625 from 2900 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

On to step 10:
525 goes into 2750 5 times with a remainder of 125.
The next digit of our result is 5. 
Result so far: 105866.55
The remainder is 125 after subtracting 2625 from 2750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

The final result is 105866.55 with a remainder of 0.125.