521669 divided by 26 
The aim is to understand the frequency of 26 in 521669.

On to step 1:
When dividing 5 by 26, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 26

Step 2:
26 goes into 52 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 52 from 52 and we're left with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 26

Let's proceed to step 3:
The number 26 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 20.0
If we take 0 away from 1, we end up with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 26

Step 4:
The number 26 fits into 16 0 times, leaving a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 200.0
Subtracting 0 from 16 leaves us with 16.
Append the next digit (6) from the dividend to 16 and continue with: 166 / 26

Step 5:
26 goes into 166 6 times with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 2006.0
The remainder is 10 after subtracting 156 from 166.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 26

Moving on to step 6:
109 divided by 26 is 4 with a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 20064.0
Deduct 104 from 109 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
The number 26 fits into 50 1 times, leaving a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 20064.1
Subtract 26 from 50 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 8:
26 goes into 240 9 times with a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 20064.19
Subtracting 234 from 240 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
60 divided by 26 is 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 20064.192
Subtract 52 from 60 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
26 can be fit into 80 3 times, resulting in a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 20064.1923
Subtract 78 from 80 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
20 divided by 26 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 20064.1923
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
If we divide 200 by 26, we get 7 and a remainder of 18.
The next digit of our result is 7. 
Result so far: 20064.192307
If we subtract 182 from 200, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 13:
If we divide 180 by 26, we get 6 and a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 20064.1923076
Deduct 156 from 180 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
The number 26 fits into 240 9 times, leaving a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 20064.19230769
Subtract 234 from 240 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 20064.19230769 with a remaining 6e-09.