We look at the division of 26987750 by 525 
The aim is to understand the frequency of 525 in 26987750.

On to step 1:
If we divide 2 by 525, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 525

On to step 2:
If we divide 26 by 525, we get 0 and a remainder of 26.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 26, we get 26.
Append the next digit (9) from the dividend to 26 and continue with: 269 / 525

Moving on to step 3:
525 can be fit into 269 0 times, resulting in a remainder of 269.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 269 after subtracting 0 from 269.
Include the next digit (8) from the dividend after 269, then repeat: 2698 / 525

Advancing to step 4:
2698 divided by 525 is 5 with a remainder of 73.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 2625 from 2698, we get 73.
Take the next digit (7) from the dividend and append it to 73, then repeat: 737 / 525

On to step 5:
525 can be fit into 737 1 times, resulting in a remainder of 212.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Subtracting 525 from 737 leaves us with 212.
Grab the next digit (7) from the dividend, add it to 212, then carry on: 2127 / 525

On to step 6:
The number 525 fits into 2127 4 times, leaving a remainder of 27.
Put 4 as the next digit of the answer. 
Result so far: 514.0
Deduct 2100 from 2127 and we're left with 27.
Append the next digit (5) from the dividend to 27 and continue with: 275 / 525

Advancing to step 7:
275 divided by 525 is 0 with a remainder of 275.
Write down 0 as next digit of the result. 
Result so far: 5140.0
Subtract 0 from 275 to get 275.
Include the next digit (0) from the dividend after 275, then repeat: 2750 / 525

Step 8:
525 can be fit into 2750 5 times, resulting in a remainder of 125.
The number 5 becomes the next digit in our result. 
Result so far: 51405.0
Deduct 2625 from 2750 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Advancing to step 9:
The number 525 fits into 1250 2 times, leaving a remainder of 200.
Use 2 as the next digit of our solution. 
Result so far: 51405.2
Deduct 1050 from 1250 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 10:
When dividing 2000 by 525, we get 3 with a remainder of 425.
Record the quotient 3 as the next digit in the result. 
Result so far: 51405.23
Deduct 1575 from 2000 and we're left with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Step 11:
The number 525 fits into 4250 8 times, leaving a remainder of 50.
Write down 8 as next digit of the result. 
Result so far: 51405.238
If we subtract 4200 from 4250, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 12:
When dividing 500 by 525, we get 0 with a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 51405.238
If we subtract 0 from 500, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Going ahead to step 13:
525 can be fit into 5000 9 times, resulting in a remainder of 275.
Record the quotient 9 as the next digit in the result. 
Result so far: 51405.23809
Deduct 4725 from 5000 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Let's proceed to step 14:
If we divide 2750 by 525, we get 5 and a remainder of 125.
Record the quotient 5 as the next digit in the result. 
Result so far: 51405.238095
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.

Step 15:
525 can be fit into 1250 2 times, resulting in a remainder of 200.
The number 2 becomes the next digit in our result. 
Result so far: 51405.2380952
Subtracting 1050 from 1250 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 16:
When dividing 2000 by 525, we get 3 with a remainder of 425.
Write down 3 as next digit of the result. 
Result so far: 51405.23809523
If we subtract 1575 from 2000, we get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

The final outcome is 51405.23809523, with a leftover of 4.25e-07.