We're dividing 426797 by 15 
The aim is to understand the frequency of 15 in 426797.

Step 1:
If we divide 4 by 15, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 15

Moving on to step 2:
The number 15 fits into 42 2 times, leaving a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 30 away from 42, we end up with 12.
Fetch the next digit (6) from the dividend, attach it to 12 and continue: 126 / 15

Moving on to step 3:
When dividing 126 by 15, we get 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 28.0
If we subtract 120 from 126, we get 6.
Fetch the next digit (7) from the dividend, attach it to 6 and continue: 67 / 15

Step 4:
When dividing 67 by 15, we get 4 with a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 284.0
Subtracting 60 from 67 leaves us with 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 15

On to step 5:
15 can be fit into 79 5 times, resulting in a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 2845.0
Subtract 75 from 79 to get 4.
Include the next digit (7) from the dividend after 4, then repeat: 47 / 15

Going ahead to step 6:
15 can be fit into 47 3 times, resulting in a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 28453.0
Subtract 45 from 47 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.

On to step 7:
15 can be fit into 20 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 28453.1
If we subtract 15 from 20, 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.

On to step 8:
The number 15 fits into 50 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 28453.13
If we subtract 45 from 50, 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.

On to step 9:
When dividing 50 by 15, we get 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 28453.133
Subtracting 45 from 50 leaves us 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.

Our division results in 28453.133 with a remaining 0.0005.