We look at the division of 436661 by 26 
The aim is to understand the frequency of 26 in 436661.

On to step 1:
26 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 26

Advancing to step 2:
When dividing 43 by 26, we get 1 with a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 26 from 43 to get 17.
Bring next digit (6) of the dividend behind the 17 and repeat the process: 176 / 26

Moving on to step 3:
The number 26 fits into 176 6 times, leaving a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 156 from 176, we get 20.
Take the next digit (6) from the dividend and append it to 20, then repeat: 206 / 26

Going ahead to step 4:
206 divided by 26 is 7 with a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 167.0
Deduct 182 from 206 and we're left with 24.
Take the next digit (6) from the dividend and append it to 24, then repeat: 246 / 26

Going ahead to step 5:
26 goes into 246 9 times with a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 1679.0
Subtracting 234 from 246 leaves us with 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 26

Going ahead to step 6:
26 can be fit into 121 4 times, resulting in a remainder of 17.
Write down 4 as next digit of the result. 
Result so far: 16794.0
Subtracting 104 from 121 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
170 divided by 26 is 6 with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 16794.6
Subtracting 156 from 170 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 8:
26 can be fit into 140 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 16794.65
Subtract 130 from 140 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
When dividing 100 by 26, we get 3 with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 16794.653
If we take 78 away from 100, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 10:
220 divided by 26 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 16794.6538
If we take 208 away from 220, we end up 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.

Step 11:
120 divided by 26 is 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 16794.65384
Deduct 104 from 120 and we're left 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.

Let's proceed to step 12:
160 divided by 26 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 16794.653846
Subtracting 156 from 160 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 13:
If we divide 40 by 26, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 16794.6538461
If we subtract 26 from 40, we 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.

Advancing to step 14:
140 divided by 26 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 16794.65384615
Subtract 130 from 140 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 16794.65384615 and a remainder of 1e-08.