We're dividing 87053447 by 15 
The aim is to understand the frequency of 15 in 87053447.

Moving on to step 1:
The number 15 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 15

On to step 2:
The number 15 fits into 87 5 times, leaving a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 75 from 87 and we're left with 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 15

Step 3:
120 divided by 15 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 58.0
If we subtract 120 from 120, we get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 15

Let's proceed to step 4:
15 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 580.0
Subtract 0 from 5 to get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 15

Going ahead to step 5:
The number 15 fits into 53 3 times, leaving a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 5803.0
If we subtract 45 from 53, we get 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 15

On to step 6:
15 goes into 84 5 times with a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 58035.0
Subtract 75 from 84 to get 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 15

Going ahead to step 7:
15 goes into 94 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 580356.0
Deduct 90 from 94 and we're left with 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 15

Advancing to step 8:
The number 15 fits into 47 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 5803563.0
If we subtract 45 from 47, we 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.

Going ahead to step 9:
15 can be fit into 20 1 times, resulting in a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 5803563.1
Deduct 15 from 20 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.

On to step 10:
When dividing 50 by 15, we get 3 with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 5803563.13
If we take 45 away from 50, 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.

On to step 11:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 5803563.133
If we take 45 away from 50, 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.

The final result is 5803563.133 with a remainder of 0.0005.