We look at the division of 638634 by 26 
The aim is to understand the frequency of 26 in 638634.

On to step 1:
26 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 26

Advancing to step 2:
The number 26 fits into 63 2 times, leaving a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 52 from 63 to get 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 26

Advancing to step 3:
118 divided by 26 is 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 24.0
Subtract 104 from 118 to get 14.
Grab the next digit (6) from the dividend, add it to 14, then carry on: 146 / 26

Step 4:
When dividing 146 by 26, we get 5 with a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 245.0
Subtracting 130 from 146 leaves us with 16.
Append the next digit (3) from the dividend to 16 and continue with: 163 / 26

Going ahead to step 5:
When dividing 163 by 26, we get 6 with a remainder of 7.
Put 6 as the next digit of the answer. 
Result so far: 2456.0
If we subtract 156 from 163, we get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 26

Advancing to step 6:
26 goes into 74 2 times with a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 24562.0
If we subtract 52 from 74, 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.

On to step 7:
26 goes into 220 8 times with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 24562.8
Deduct 208 from 220 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 8:
If we divide 120 by 26, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 24562.84
Subtracting 104 from 120 leaves us 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.

Advancing to step 9:
If we divide 160 by 26, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 24562.846
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 10:
26 can be fit into 40 1 times, resulting in a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 24562.8461
Subtract 26 from 40 to 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.

Moving on to step 11:
The number 26 fits into 140 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 24562.84615
The remainder is 10 after subtracting 130 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 12:
26 can be fit into 100 3 times, resulting in a remainder of 22.
The next digit of our result is 3. 
Result so far: 24562.846153
Subtract 78 from 100 to 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.

Let's proceed to step 13:
26 can be fit into 220 8 times, resulting in a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 24562.8461538
Subtract 208 from 220 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 14:
If we divide 120 by 26, we get 4 and a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 24562.84615384
Subtracting 104 from 120 leaves us 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.

Our division results in 24562.84615384 with a remaining 1.6e-08.