We look at the division of 521925 by 26 
The aim is to understand the frequency of 26 in 521925.

Let's proceed to step 1:
26 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 26

Let's proceed to step 2:
The number 26 fits into 52 2 times, leaving a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 52 from 52 and we're left with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 26

On to step 3:
1 divided by 26 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 26

On to step 4:
19 divided by 26 is 0 with a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 200.0
If we take 0 away from 19, we end up with 19.
Grab the next digit (2) from the dividend, add it to 19, then carry on: 192 / 26

Step 5:
26 can be fit into 192 7 times, resulting in a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 2007.0
Subtracting 182 from 192 leaves us with 10.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 26

Let's proceed to step 6:
The number 26 fits into 105 4 times, leaving a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 20074.0
The remainder is 1 after subtracting 104 from 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
The number 26 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 20074.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 26 is 3 with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 20074.03
If we subtract 78 from 100, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
220 divided by 26 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 20074.038
The remainder is 12 after subtracting 208 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
26 can be fit into 120 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 20074.0384
Deduct 104 from 120 and we're left 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.

Going ahead to step 11:
26 can be fit into 160 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 20074.03846
Subtract 156 from 160 to 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.

Advancing to step 12:
40 divided by 26 is 1 with a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 20074.038461
If we subtract 26 from 40, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 13:
26 can be fit into 140 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 20074.0384615
If we subtract 130 from 140, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 14:
26 can be fit into 100 3 times, resulting in a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 20074.03846153
The remainder is 22 after subtracting 78 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 20074.03846153 with a remainder of 2.2e-08.