We look at the division of 129875 by 26 
The aim is to understand the frequency of 26 in 129875.

Going ahead to step 1:
The number 26 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 26

Advancing to step 2:
26 goes into 12 0 times with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 26

Let's proceed to step 3:
26 can be fit into 129 4 times, resulting in a remainder of 25.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 25 after subtracting 104 from 129.
Grab the next digit (8) from the dividend, add it to 25, then carry on: 258 / 26

Moving on to step 4:
26 goes into 258 9 times with a remainder of 24.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
The remainder is 24 after subtracting 234 from 258.
Grab the next digit (7) from the dividend, add it to 24, then carry on: 247 / 26

Step 5:
247 divided by 26 is 9 with a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 499.0
Subtracting 234 from 247 leaves us with 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 26

On to step 6:
The number 26 fits into 135 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 4995.0
If we take 130 away from 135, we end up 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.

Step 7:
26 goes into 50 1 times with a remainder of 24.
The next digit of our result is 1. 
Result so far: 4995.1
The remainder is 24 after subtracting 26 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 8:
240 divided by 26 is 9 with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 4995.19
Deduct 234 from 240 and we're left 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.

Going ahead to step 9:
When dividing 60 by 26, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 4995.192
If we subtract 52 from 60, we 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:
80 divided by 26 is 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 4995.1923
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:
26 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 4995.1923
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
26 goes into 200 7 times with a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 4995.192307
The remainder is 18 after subtracting 182 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
The number 26 fits into 180 6 times, leaving a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 4995.1923076
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.

Going ahead to step 14:
240 divided by 26 is 9 with a remainder of 6.
The next digit of our result is 9. 
Result so far: 4995.19230769
Deduct 234 from 240 and we're left 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.

The final outcome is 4995.19230769, with a leftover of 6e-09.