8781941 divided by 525 
The aim is to understand the frequency of 525 in 8781941.

Let's proceed to step 1:
8 divided by 525 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 525

Moving on to step 2:
525 goes into 87 0 times with a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 87 leaves us with 87.
Bring next digit (8) of the dividend behind the 87 and repeat the process: 878 / 525

Step 3:
When dividing 878 by 525, we get 1 with a remainder of 353.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 525 away from 878, we end up with 353.
Fetch the next digit (1) from the dividend, attach it to 353 and continue: 3531 / 525

Moving on to step 4:
525 goes into 3531 6 times with a remainder of 381.
The next digit of our result is 6. 
Result so far: 16.0
Subtract 3150 from 3531 to get 381.
Take the next digit (9) from the dividend and append it to 381, then repeat: 3819 / 525

Step 5:
525 goes into 3819 7 times with a remainder of 144.
The next digit of our result is 7. 
Result so far: 167.0
If we take 3675 away from 3819, we end up with 144.
Include the next digit (4) from the dividend after 144, then repeat: 1444 / 525

On to step 6:
If we divide 1444 by 525, we get 2 and a remainder of 394.
The number 2 becomes the next digit in our result. 
Result so far: 1672.0
The remainder is 394 after subtracting 1050 from 1444.
Include the next digit (1) from the dividend after 394, then repeat: 3941 / 525

On to step 7:
525 can be fit into 3941 7 times, resulting in a remainder of 266.
The number 7 becomes the next digit in our result. 
Result so far: 16727.0
Subtracting 3675 from 3941 leaves us with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Step 8:
525 can be fit into 2660 5 times, resulting in a remainder of 35.
The next digit of our result is 5. 
Result so far: 16727.5
If we subtract 2625 from 2660, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 9:
525 can be fit into 350 0 times, resulting in a remainder of 350.
Put 0 as the next digit of the answer. 
Result so far: 16727.5
If we take 0 away from 350, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 10:
525 can be fit into 3500 6 times, resulting in a remainder of 350.
Put 6 as the next digit of the answer. 
Result so far: 16727.506
The remainder is 350 after subtracting 3150 from 3500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Let's proceed to step 11:
3500 divided by 525 is 6 with a remainder of 350.
The next digit of our result is 6. 
Result so far: 16727.5066
Subtracting 3150 from 3500 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

The quotient of the division is 16727.5066, and the remainder is 0.0035.