612117 ÷ 15 
The aim is to understand the frequency of 15 in 612117.

Step 1:
15 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 15

On to step 2:
61 divided by 15 is 4 with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 60 from 61 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 15

Going ahead to step 3:
When dividing 12 by 15, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 40.0
Deduct 0 from 12 and we're left with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 15

Going ahead to step 4:
The number 15 fits into 121 8 times, leaving a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 408.0
If we subtract 120 from 121, we get 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 15

Going ahead to step 5:
When dividing 11 by 15, we get 0 with a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 4080.0
Subtracting 0 from 11 leaves us with 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 15

Going ahead to step 6:
117 divided by 15 is 7 with a remainder of 12.
Put 7 as the next digit of the answer. 
Result so far: 40807.0
If we take 105 away from 117, 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 7:
When dividing 120 by 15, we get 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 40807.8
If we take 120 away from 120, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 40807.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40807.8
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 40807.8, with a leftover of 0.0.