We look at the division of 137519 by 26 
The aim is to understand the frequency of 26 in 137519.

On to step 1:
26 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 26

Going ahead to step 2:
When dividing 13 by 26, we get 0 with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Bring next digit (7) of the dividend behind the 13 and repeat the process: 137 / 26

Step 3:
If we divide 137 by 26, we get 5 and a remainder of 7.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 130 away from 137, we end up with 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 26

Moving on to step 4:
When dividing 75 by 26, we get 2 with a remainder of 23.
Write down 2 as next digit of the result. 
Result so far: 52.0
The remainder is 23 after subtracting 52 from 75.
Grab the next digit (1) from the dividend, add it to 23, then carry on: 231 / 26

Going ahead to step 5:
If we divide 231 by 26, we get 8 and a remainder of 23.
Use 8 as the next digit of our solution. 
Result so far: 528.0
Deduct 208 from 231 and we're left with 23.
Include the next digit (9) from the dividend after 23, then repeat: 239 / 26

On to step 6:
If we divide 239 by 26, we get 9 and a remainder of 5.
The next digit of our result is 9. 
Result so far: 5289.0
If we subtract 234 from 239, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
26 can be fit into 50 1 times, resulting in a remainder of 24.
The next digit of our result is 1. 
Result so far: 5289.1
Subtracting 26 from 50 leaves us 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 8:
26 can be fit into 240 9 times, resulting in a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 5289.19
If we subtract 234 from 240, we 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.

Going ahead 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: 5289.192
The remainder is 8 after subtracting 52 from 60.
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:
If we divide 80 by 26, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 5289.1923
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
The number 26 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 5289.1923
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
The number 26 fits into 200 7 times, leaving a remainder of 18.
The next digit of our result is 7. 
Result so far: 5289.192307
Subtract 182 from 200 to 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.

Going ahead to step 13:
26 can be fit into 180 6 times, resulting in a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 5289.1923076
Subtracting 156 from 180 leaves us 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:
If we divide 240 by 26, we get 9 and a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 5289.19230769
If we take 234 away from 240, we end up 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.

Our division results in 5289.19230769 with a remaining 6e-09.