87806 ÷ 15 
The aim is to understand the frequency of 15 in 87806.

On to step 1:
When dividing 8 by 15, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 15

Step 2:
15 can be fit into 87 5 times, resulting in a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 75 from 87 to get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 15

Let's proceed to step 3:
When dividing 128 by 15, we get 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 58.0
The remainder is 8 after subtracting 120 from 128.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 15

Going ahead to step 4:
When dividing 80 by 15, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 585.0
Subtracting 75 from 80 leaves us with 5.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 15

Step 5:
56 divided by 15 is 3 with a remainder of 11.
The next digit of our result is 3. 
Result so far: 5853.0
Subtract 45 from 56 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 6:
110 divided by 15 is 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 5853.7
Deduct 105 from 110 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.

Step 7:
If we divide 50 by 15, we get 3 and a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 5853.73
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.

Advancing to step 8:
50 divided by 15 is 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 5853.733
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.

The quotient of the division is 5853.733, and the remainder is 0.0005.