We're dividing 820379 by 15 
The aim is to understand the frequency of 15 in 820379.

Let's proceed to step 1:
When dividing 8 by 15, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 15

Going ahead to step 2:
The number 15 fits into 82 5 times, leaving a remainder of 7.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 7 after subtracting 75 from 82.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 15

Moving on to step 3:
15 goes into 70 4 times with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 54.0
If we take 60 away from 70, we end up with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 15

Going ahead to step 4:
103 divided by 15 is 6 with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 546.0
Subtracting 90 from 103 leaves us with 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 15

Advancing to step 5:
When dividing 137 by 15, we get 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 5469.0
If we take 135 away from 137, we end up with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 15

Advancing to step 6:
The number 15 fits into 29 1 times, leaving a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 54691.0
Subtract 15 from 29 to 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.

Going ahead to step 7:
15 can be fit into 140 9 times, resulting in a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 54691.9
If we take 135 away from 140, we end up 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:
If we divide 50 by 15, we get 3 and a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 54691.93
Deduct 45 from 50 and we're left 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.

Going ahead to step 9:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 54691.933
Deduct 45 from 50 and we're left 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 54691.933 with a remaining 0.0005.