We're dividing 71509523 by 26 
The aim is to understand the frequency of 26 in 71509523.

On to step 1:
7 divided by 26 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 26

Let's proceed to step 2:
26 goes into 71 2 times with a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 52 from 71 and we're left with 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 26

Advancing to step 3:
26 goes into 195 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 27.0
If we subtract 182 from 195, we get 13.
Take the next digit (0) from the dividend and append it to 13, then repeat: 130 / 26

Step 4:
If we divide 130 by 26, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 275.0
Subtract 130 from 130 to get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 26

On to step 5:
26 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 2750.0
If we subtract 0 from 9, we get 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 26

Advancing to step 6:
26 can be fit into 95 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 27503.0
Deduct 78 from 95 and we're left with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 26

Let's proceed to step 7:
26 goes into 172 6 times with a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 275036.0
If we take 156 away from 172, we end up with 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 26

Step 8:
When dividing 163 by 26, we get 6 with a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 2750366.0
Subtract 156 from 163 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
70 divided by 26 is 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 2750366.2
Deduct 52 from 70 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
26 goes into 180 6 times with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 2750366.26
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 11:
26 can be fit into 240 9 times, resulting in a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 2750366.269
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.

On to step 12:
26 goes into 60 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 2750366.2692
Subtracting 52 from 60 leaves us with 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 13:
80 divided by 26 is 3 with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 2750366.26923
If we subtract 78 from 80, we 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.

Advancing to step 14:
26 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 2750366.26923
Subtracting 0 from 20 leaves us 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.

Let's proceed to step 15:
26 goes into 200 7 times with a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 2750366.2692307
If we take 182 away from 200, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 16:
When dividing 180 by 26, we get 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 2750366.26923076
If we take 156 away from 180, we end up 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.

After the division, we end up with 2750366.26923076 and a remainder of 2.4e-08.