We're dividing 855722 by 15 
The aim is to understand the frequency of 15 in 855722.

Let's proceed to step 1:
8 divided by 15 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 15

On to step 2:
When dividing 85 by 15, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 10 after subtracting 75 from 85.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 15

Let's proceed to step 3:
The number 15 fits into 105 7 times, leaving a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 57.0
The remainder is 0 after subtracting 105 from 105.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 15

Advancing to step 4:
When dividing 7 by 15, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 570.0
If we take 0 away from 7, we end up with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 15

Going ahead to step 5:
15 can be fit into 72 4 times, resulting in a remainder of 12.
The next digit of our result is 4. 
Result so far: 5704.0
If we take 60 away from 72, we end up with 12.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 15

On to step 6:
122 divided by 15 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 57048.0
If we take 120 away from 122, we end up 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.

On to step 7:
15 goes into 20 1 times with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 57048.1
Subtracting 15 from 20 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.

Let's proceed to step 8:
50 divided by 15 is 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 57048.13
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:
15 goes into 50 3 times with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 57048.133
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 57048.133 and a remainder of 0.0005.