We're dividing 503851 by 26 
The aim is to understand the frequency of 26 in 503851.

Let's proceed to step 1:
If we divide 5 by 26, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 26

Moving on to step 2:
If we divide 50 by 26, we get 1 and a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 26 from 50 and we're left with 24.
Append the next digit (3) from the dividend to 24 and continue with: 243 / 26

On to step 3:
The number 26 fits into 243 9 times, leaving a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 19.0
Deduct 234 from 243 and we're left with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 26

Advancing to step 4:
The number 26 fits into 98 3 times, leaving a remainder of 20.
Put 3 as the next digit of the answer. 
Result so far: 193.0
If we take 78 away from 98, we end up with 20.
Bring next digit (5) of the dividend behind the 20 and repeat the process: 205 / 26

On to step 5:
The number 26 fits into 205 7 times, leaving a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 1937.0
Subtracting 182 from 205 leaves us with 23.
Bring next digit (1) of the dividend behind the 23 and repeat the process: 231 / 26

Advancing to step 6:
26 goes into 231 8 times with a remainder of 23.
Use 8 as the next digit of our solution. 
Result so far: 19378.0
If we subtract 208 from 231, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 7:
When dividing 230 by 26, we get 8 with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 19378.8
If we subtract 208 from 230, 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.

Let's proceed to step 8:
If we divide 220 by 26, we get 8 and a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 19378.88
The remainder is 12 after subtracting 208 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 19378.88, with a leftover of 0.012.